low fever in tww

Ashley • L&D RN - TTC 48 months, 3 failed IUIs... moving on to IVF
7dpo and last night at 4th of July party, among all the excitement, I passed out around 6pm. This morning woke up feeling like I was hit by a truck with all over achyness, nausea, and elevated temp of 99.2 (I usually run low). Also, my breasts always feel a little sore on the day of my period but my breasts are absolutely KILLING me. My nipples and breasts feel like they were scrubbed with sandpaper. 
This evening I'm temping every 15 and it's going up .2 right now I'm at 101. I've read about EPF causing your immune system to weaken and that many women get sick during tww
Any thoughts? 
Edit: fever jumped to 102.3 and I took Tylenol. Fx this is all for something!