Problem with my stomach; Palpitation; I couldn't eat well; My stomach is like digestion as I eat; Pain on my left side below the breast and the pain hits me on the back of my like close to the waist line but at the back between there; Uncomfortable; I also lost almost 2 pound; Gastritis; Pain on my left side below the breast and the pain hits me on the back of my like close to the waist line but at the back between there; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A patient (no qualifiers provided) received bnt162b2 (BNT162B2), administration date Apr2021 (Lot number: ER8729) as dose 2, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose 1), for COVID-19 Immunization, reaction(s): "Feel sick". The following information was reported: ABDOMINAL DISCOMFORT (non-serious) with onset Apr2021, outcome "not recovered", described as "Problem with my stomach"; PALPITATIONS (non-serious) with onset Apr2021, outcome "not recovered", described as "Palpitation"; EATING DISORDER (non-serious) with onset Apr2021, outcome "not recovered", described as "I couldn't eat well"; DYSPEPSIA (non-serious) with onset Apr2021, outcome "not recovered", described as "My stomach is like digestion as I eat"; BREAST PAIN (non-serious), BACK PAIN (non-serious) all with onset Apr2021, outcome "not recovered" and all described as "Pain on my left side below the breast and the pain hits me on the back of my like close to the waist line but at the back between there"; DISCOMFORT (non-serious) with onset Apr2021, outcome "not recovered", described as "Uncomfortable"; WEIGHT DECREASED (non-serious) with onset Apr2021, outcome "unknown", described as "I also lost almost 2 pound"; GASTRITIS (non-serious) with onset Apr2021, outcome "unknown", described as "Gastritis". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of abdominal discomfort, palpitations, eating disorder, dyspepsia, breast pain, discomfort, back pain.  Additional information: Patient reported when I got the COVID 5 months ago I was very sick somehow with the same problem, not the same problem exactly but my stomach and then I have like palpitation, I couldn't eat well. So they gave me the second shot, it's been 2 weeks my stomach is like the digestion, as I eat I guess I never had this problem and it's like if I eat like half an hour I have like a pain on my left side below the breast and the pain hits me on the back of my like close to the waist line but at the back between there. And it goes away after hours like its uncomfortable and just like to find out if anybody report any side effect something like me. And I don't know what the doctor gave me the last time when I end up in emergency, he gave me the 10 tabs of Zehist and it helped me a little bit, but today I took one again so I can take that for another 10 days but I had the same symptoms from the past 2 weeks from the time I got the second shot.  So, I just don't know if it's anything to do with that or anybody report anything like that so that I can figure out how to take care of that because I don't know what else to do any more, I also lost almost 2 pound because I have gastritis.  No follow-up attempts are possible. No further information is expected.