First time anal

So me and my guy did anal for the first time. I am feeling pain in my anus right now as if theres something stuck in between my butt cheeks. I checked in the mirror and saw that my anus is swollen and has like little flower. The space between my butthole and vag is also swollen. Is this normal? When should this "flower " like muscle get in. Do I need to push it inside? What can I do to make my anal muscle tight again. Help!