Back in late August/early September my estrogen levels crashed. I became extremely fatigued and had terrible hot flashes and broke a sweat just walking across the room. Basically full menopause symptoms.
I hd been on oral estrogen and after I went to see my doctor she switched me to injectables. Now, three months later I'm feeling normal again, but for a couple of months I was super depressed and felt lousy all the time. So yeah, sometimes the body gets all wacky.