Feeling off

I’m feeling so off since I hit the third trimester. All day today I have been feeling super winded and in pain (lots of pelvic pain), and I keep accidentally falling asleep on the couch and feeling super faint and tired. I keep getting this weird pressure in my pelvis that makes me feel like I’m gonna pass out so idk if baby is sitting on a nerve or an artery, but I try to lay on my side to get him to move and it doesn’t help. And for some reason mentally I have been feeling super down, like almost depressed. I haven’t felt like this the entire time I’ve been pregnant, even though this pregnancy has been hard, and I keep feeling like I’m off my game and I need to quit everything and stop letting people down. It’s been frustrating, and it’s making me irritable. I get mad at myself sometimes because my irritation is so bad, if that makes sense. Idk. I guess I just needed to vent. 11 more weeks.