I got the Pfizer shot yesterday. Symptoms are minor; slight headache, sore arm, fatigue, and joint pain that I expect will be gone in a day or two. Having some vaccine symptoms is OK. It indicates that your immune system is alerted to the mRNA bits in the shots. I'm 69 and got covid in March and still have a bit of LC with occasional chest pain and fatigue. The vaccines don't necessarily prevent covid, they lessen the severitiy which is important to keeping people out of hospitals.