Fever at 11 weeks

I've been running a fever since Thursday but the highest it's been at has been 99.8, so a mild fever. But today it got up to 100.8. I went to urgent care Thursday and she said Tylenol is about the only thing I can take for the fever and body aches. I also know Tylenol can be taken if it's regular or extra strength. Anyone know how  high of a fever to be worrying about. I have an appointment with my OBGYN Tuesday but I'm worried right now. Any experiences or advice you can give me?