Anyone else not able to handle tiredness anymore?

I (23f) don't know if this has to do with the cancer or not (I also have an iron deficiency that might be causing this), but I can't handle staying up late/waking up early anymore. I had a pt last year and my endo says my meds are right, but every time I lose sleep or stay up later than usual, I wake up feeling like absolute garbage. I've been anxious about a new job lately and haven't been sleeping well, and I just woke up feeling like I got my ass kicked. Is this common?