Hemmorhoids? (Tmi -description.)

I am 30 weeks 2 days and almost positive I have an external hemmorhoid. It doesn't hurt but there's like a little bubble of skin right on my butt hole and I can push it back in but next time i poop it comes back out. (TMI I KNOW) I go back to my OB on April 7th. But idk if I'm supposed to tell her or my GP? Someone help.