Does E2 Rise & Fall Throughout the Day?

So ive always wondered this because since ive been on TRT there are times during the day where my muscles seem hard and tight and then for no apparent reason I soften up like a water balloon. Lately my armpits start sweating right around that same time frame and my stomach looks bloated as well. I can deal with a little extra sweat but the bloated stomach and soft pecs drive me nuts. Tell me this is just my estrogen going up and down and I dont have some damn auto-immune disorter or something