You should go in. Don't go by your temperature. Why? You are on Pred. That can reduce the signs of a problem/infection (suppresses the immune system). And due to being on Pred, you may be more susceptible to aseptic or bacterial meningitis. Please don't just sit at home!!!
You and your doctors have to know what happened. The only way to know is to have an ER doctor assess you.
I'm sorry you had this kind of reaction. They may want to try a different IVIG brand (do you know which one you had?).
If you do go in, wear a mask. Lots of germs in an ER!

Annie