After anal???

So I'm a little worried right now. I've been with my bf for over 3 years & we've done anal maybe 5-6 times ? BUT we only succeeded 2-3 times. We rarely ever do anal & it's REALLY spaced out from when we do it. Tonight I decided to give it another go, & it worked! However now that we're done, I used the restroom & there was this mucus like stuff coming out. He came in me too, but it isn't that. Is this normal? Also...will my hole go back to normal after only doing it so many times? Rn it's really pink & looks like it's slightly gaping...we did it like 30-45 mins ago. I've heard horror stories of women having their holes so wide open from anal that they can't hold in their poop. Will it go back? How long does it take to go back?