Is it normal to have a fever post-op?

I am 6 days post-op and for the third night in a row I have a fever. Right now it is 100.3. Why am I doing this? I have heard that it's ok.. it is just my body healing.. and I have heard that it could be infection. I'm confused and scared!

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.