stomach hurting; started not feeling good; nauseated; headache; coughing; sneezing; cold-like symptoms/cold; nose got itchy/eyes got itchy; difficulty breathing/having trouble breathing; feels weak/has no energy; She experienced chills about three hours after the vaccine.; abdominal pain; This is a spontaneous report from a contactable consumer (patient) via Medical information team. A 20-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: solution for injection, lot number: EW0191; Expiration Date: Sep2021), via an unspecified route of administration, in Left arm on 22May2021 at 11:30 (at the age of 20-years) as single dose for covid-19 immunization. Medical history included ongoing acid reflux in the stomach; was diagnosed about one or two years ago. The patient did not receive any vaccinations within 4 weeks prior to the administration of suspect vaccine. The patient's concomitant medications included ongoing Tri-lo-sprintec (started taking it to regulate her cycle as she had an irregular period; she started this birth control 2 or 3 years ago). On 22May2021, the patient waited 15 minutes after the shot and felt fine, but later on that day (a couple of hours after) she got chills (about three hours after the vaccine). She stated she had normal side effects and did not think anything of it. On Sunday (23May2021), she had difficulty breathing (trouble breathing) and felt weak (feeling very weak and has no energy). She voiced it's hard for her to wear a mask. When she had to put a mask on it really felt like she could not breathe, and the air feels stuffy especially if she wears a mask; every couple of seconds she had to wear the mask under her nose because she could not breathe. Caller stated that she did not have this problem before receiving the COVID vaccine. On Monday (24May2021), she felt like she was coming down with a cold. Caller stated that she thought that might be her trouble breathing was from her cold-like symptoms, but she does not think it was, because she was not experiencing any cold-like symptoms on Sunday and was only having trouble breathing. She experienced coughing, sneezing, itching eyes/nose, chills, and headache. On Wednesday (26May2021), she started feeling nauseated (got very nauseous), not feeling good, she was getting a headache and had caught a cold. Caller stated she did not know if it was from vaccine shot but her eyes got itchy, her nose got itchy, and she kept sneezing and coughing. Yesterday (26May2021), the chills went away, she has not had any chills today, but she does not know if she will have any from this point on. She believed that she has recovered with lasting effects. Caller stated that not feeling well was ongoing and persisting, but then stated that she feels it was worsening. Yesterday, she just felt nauseous, today she woke up with her stomach hurting very badly and abdominal pain; her weakness has continued. Yesterday she took pantoprazole for the abdominal pain and Tylenol for the pain and headache. She stated that she had a slight headache that is now coming and going, clarifies that it is persisting. Caller thought the reason that her stomach is hurting was because of her stomach acid problem. She deals with a strict diet that she must follow for things she was not supposed to have. Since she had the COVID shot, she believes it was affecting the acid problems in her stomach. Caller clarified that she was calling to see what she should do, if she should go see a doctor or if this is normal. The outcome of events Dyspnoea, Asthenia, Sneezing, Headache, stomach hurting, Itchy was not resolved. The outcome of events of Nausea, started not feeling good, Cold like symptoms was resolving. The outcome of events chills was resolved with sequel on 26May2021, and Cough resolved with sequel on 25May2021. The outcome of Abdominal pain was unknown.  Information on Lot/Batch number was available. Additional information has been requested.