I tried anal with my SO around first week of April, it did hurt a lot but after a few minutes of finally inserting his **** inside, it felt good,I wasn't able to poop after a day. After a few days, I was able to poop but I had to wait for it to come out, now I've been struggling to poop and been constipated for days unlike back then, I could poop less than 5 mins. What could have been the cause?