It can also happen that the ones who do not feel the side-effects with the first shot, may feel them more intensely the second time around.
Right now, it has also been reported that women tend to feel more severe side-effects, especially with the second shot in comparison to men because of their hormonal balance and fluctuations.
As for the side-effects itself, one can expect usual inflammatory reactions, such as fever, body pain, chills, fatigue, soreness in the arm, tiredness. To take care, consider taking a day off, if you can and take plenty of rest. Hydrate yourself, eat well, and take painkillers if the side-effects are getting a bit too much for you.