Flu shot.... feel yucky

Urghhh..... so I ended up getting a flu shot, despite my gut telling me not too. I have never had one before.... but I have had the flu twice. One of those times was when DS was about 2 months old. So, I kind of thought I should get one. Now my arm is red and swollen and I feel yucky. Granted, it's nothing as bad as the flu.... but I just have that tired, run down "yuck" feeling.