For 3 fucking days about a year ago, I was breathing manually. That was so god awful. I thought I had broken something, it was exhausting!!! Cause I'd have to manually breathe as I fell asleep, so I also had a fun touch of insomnia. Like legit, my automatic breathing was turned off unless I was unconscious. Thankfully, it did go away. Dunno if anyone needs to hear this, but if it's happening to you and you have anxiety/ocd stuff like I do - yes, it sucks. No, you're not broken. Yes, you'll be able to breath normally again (eventually).