You should get it checked just in case. And before you take any more call your pdoc and ask.

I had the rash and the first day it was just a little patch of bumps on the side of my face near my mouth. I thought nothing of it because I was out of the high risk period and took my next dose. The next day it was on much of my face, my lips, my eyelid, etc. I immediately was pulled off it and obviously can never try it again. But I have a feeling it wouldn't have gotten nearly so bad if I had just skipped that night dose until I could talk to my pdoc.

Better safe than sorry!