stomach pain; weight has gone down quite a bit; gastritis; Bloating; Fever; Vomiting; Body aches; Issues with bowel movements; Loss of appetitie; Abdominal pain; Nausea; Chills; Fatigue; Arm soreness; This is a spontaneous report from a contactable consumer or other non-HCP (patient herself). A 29-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: EP7534) via intramuscular route of administration in left arm on 20Mar2021 at 12:15 (at the age of 29 years-old) as dose 2, single for COVID-19 immunization. Patient medical history included irritable bowel syndrome (IBS) diagnosed when patient was in 6th grade, generalised anxiety disorder, vasovagal syncope, gastric disorder (gastric issues), Family history includes patient mother had colorectal cancer and was entering into hospice, diagnosed in 2010 when patient was a senior in high school, used to be with convulsions but that hasn't happened in a while. Patient was doing the BRAT diet but can't even keep that down. Medical History (including any illness at time of vaccination) was none. The concomitant medications were not reported. Historical vaccine included BNT162b2 (COMIRNATY, Solution for injection, Lot number- EN6205) via an intramuscular route of administration in left arm on 27Feb2021 at 12:15 as dose 1, single (at the age of 28 years-old) for COVID-19 immunization. No prior Vaccinations (within 4 weeks). On 20Mar2021 patient experienced chills (having a lot of chills at night, especially around 2 or 3 morning), fatigue (got better and then began again 7 Apr 2021), arm soreness, vomiting (vomiting, chills that started 20 Mar 2021, went away and then started again on 7 Apr 2021) again on 29Mar2021 nausea, abdominal pain, Loss of appetite (keep food down), then on 7Apr2021 fever of 101.6 that was every night (now it is every night and every few hours), body aches, Bloating, Issues with bowel movements, on an unspecified date Stomach pain, weight has gone down quite a bit, gastritis. The patient visited emergency room visit for Vomiting, fever, she has been to urgent care, primary care, and has spoken with her gastroenterologist. The patient underwent lab tests and procedures which included blood test normal (blood draw): normal, computerised tomogram (CAT scan): normal on an unspecified date based on gastroenterologist suggestion. The body temperature (fever) 101.6 on 07Apr2021 and 100.4 on an unspecified date. Therapeutic measures prescribed by her doctor, Zofran were taken as a result of nausea, vomiting, abdominal pain, fever (pyrexia), chills, wasn't really helping, she was throwing up the Zofran. It was also at the point where even if she takes a Zofran, she was throwing it up so there was not enough point, like she can't keep them long enough. she was taking omeprazole, Zofran and has been drinking Miralax with water. Treatment reports that she did have bowel movement this morning because of Miralax. She had taken ibuprofen and still had a fever of 100.4. Patient having issues with bowel movements, could that be because of a lack of food. she has IBS so going to the bathroom was not usually a problem, not used to taking anything like Miralax. The report was not related to a study or programme. No investigation assessment. Reporter states that her symptoms were not going away, she was constantly vomiting and can't. Gastroenterologist has ordered an upper endoscopy and colonoscopy scheduled this week. Patient originally went to urgent care on 1 Apr 2021, then went to primary care on 7 Apr 2021 and that, primary care ordered ultrasound for the next day. On 8 Apr 2021 caller was vomiting so she drove herself to the emergency room, then met with gastroenterologist online 12 Apr 2021. Patient states that after the CAT scan and blood draw results came back normal the emergency room doctor assumed it was gastritis but reports that gastroenterologist says if it is gastritis, it was the worst case they have ever seen. Reports that she ended up back at her primary care office 12 Apr 2021 because she still has a fever and the doctor called her and told her to come into the office. when she went in, she had taken ibuprofen and still had a fever of 100.4. Patient states that the fever was still coming down so must have been a lot higher before the ibuprofen. States that her primary care did a physical and pressed on her stomach, doctor said stomach feels normal. The patient was not hospitalized for events. Adverse events following prior vaccinations was none. Reporter wanted to know whether events did the events it started in 2 days or days later like her and side effects been reported and how long are they supposed to last. The clinical outcome for the events nausea, vomiting, abdominal pain, fever, chills, fatigue, loss of appetite, bloating was not recovered, body aches, issues with bowel movements was recovering and arm soreness recovered on 22Mar2021 (within 2 days) while that of Stomach pain, weight has gone down quite a bit, gastritis was unknown.  No follow-up attempts are needed. No further information is expected.