What is this?!

I got my first depo shot in almost a year Thursday. Last week. But for a couple weeks my boobs have hurt more and more and got heavier.. I’m exhausted too. I slept a full 8 hours on my boyfriends couch and slept for three days between eating and peeing and showering. I couldn’t keep my eyes open. I don’t know what’s happening. I’m not taking a test because there’s no way. I’ve tested before and they were negative. Should I? I’m not nauseous or anything so I keep telling myself it’s nothing. 🙃