3rd trimester funk

Few days shy of 39 weeks and I am so irritable. I'm grouchy toward my son, spouse, coworkers, everyone. I feel extremely down and I don't even know why. Well besides feeling like a whale, sleeping 45 minutes at a time, having trouble with basic movements and peeing every 30-45 minutes. I am sooo tired of being pregnant, but I'm starting to worry this will carry over into my post partum recovery. Are these feelings normal at this stage? Literally everything is pissing me off. I just wanna shut myself in my room with no noise