Chest pressure/I felt like the chest was being squeezed and the chest discomfort; chest pain or pressure like the chest is being squeezed; Tiredness/if I do exercise, I feel easier to be tired; my physical strength is not as before; This is a spontaneous report from a Pfizer sponsored program via a contactable consumer (patient) reported for herself. A 49-year-old female patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Lot number: EW0171, Expiration date: Aug2021) via an unspecified route of administration, administered in left arm on 30Apr2021 (age at vaccination was 49 years) as 2nd dose, single for COVID-19 immunization. The patient's medical history was not reported. The patient stated she had a heart infection in which was not at 25 when she was in her teen years. She meant it was like 30 years ago, she had a heart infection more than 30 years ago. But she did a test, that was one couple of years ago. Doctors said her heart was fine. The heart infection was not diagnosed, it was not identified by doctor. She just didn't remember what was the name but according to symptoms, the doctors said it should be a heart infection. The patient's concomitant medications included Vitamins. The patient previously received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Lot number: unknown, Expiration date: unknown) via an unspecified route of administration, administered in left arm on 09Apr2021 (age at vaccination was 49 years) as 1st dose, single for COVID-19 immunization and there were no reactions reported. The patient said she got the second dose of the Pfizer COVID Vaccine last 30Apr2021 and on 01May2021, the second day after 12 hours noon, she experienced side effects which is chest pain or pressure like the chest is being squeezed. After the first of few days after the second dose, she had a chest pressure, and later she had known from news that was the inflammation of chest, like something could be, like a mild 'cardioditis'. She didn't know what that was. She went to see doctor. She had it a few days after second dose. Again, chest pressure. She felt like the chest was being squeezed and the chest discomfort. And after that it had been so long. It had been one and a half month now. What she noticed was her physical strength was not as before, like when she did exercise, she used to do fine. But now if she did exercise, she felt easier to be tired. She had chest pressure and tiredness after even now so far after second dose, one and a half month now. Compared to before, her physical strength decreased. Like when she used to do exercise, she did not feel easy but now she felt easier to be tired after exercise or during exercise. She wanted to know what she should do. The patient stated that she didn't have other medical, after a few days. After like a one couple of weeks. She felt okay but she felt until now, compared before the vaccine, her physical strength, like she used to do a lot of exercise she didn't feel tired. Now it was easier to feel tired. The patient asked regarding the meaning of expiration date and whether that means she needed to get a shot again after August. The patient was informed that the product should not be used after expiration date. The patient was informed about the role of Pfizer and also informed that Pfizer Medical Information was the right department to answer the question. The patient was informed about the role of Pfizer. The patient did not receive any prior vaccinations before the Pfizer vaccine. The outcome of the events was unknown.  Follow-up attempts are possible. Further information is expected.