anal-hurting/bleeding/pooping?!!

so me and my boyfriend have done anal a couple times now. at first we were like “ew no, who would do that?!?” but one time it just happened and so we’ve been liking it. afterwards, i always bleed a little bit. not like i would on my period but when i wipe, i see a little blood. i think it’s normal because i mean my ass is being stretched but i just want to make sure lol. also, is it normal to poop after?? or feel like you have to?? maybe it’s because i’m on my period and i always poop a lil more then, i’m not sure though haha