What Causes Severe Migraines And Night Sweats While On Aleve And Synthroid?

I m 55 & still having regular periods. in the past 3 months, I ve had a few bouts of severe migraines. I understand that I m perimenapausal . I ve woken up feeling HOT & had have 2 nights w night sweats. More recently I ve had a few bouts of chills , fatique but the one that concerns me the most is an actual low grade fever from time to time. the fever responds to Aleve & rest. sometimes I feel like I just have a fall allergy with a slight non productive cough. I m still working full time & I just seem to tire easily. I attribute it to not sleeping well. All in all, I feel I m probably just peri-menapausal but the slight low grade fever seems more than a hot flash. No blood in urine or feces. I take Synroid 75mg for hyopthroid , Imitrex for migtaines & Aleve for body aches, fever etc. I take flax seed, & Vitamin B2 daily.