Pain?

My boyfriend and I tried anal last night, I had done it before but it was a long time ago... truthfully, he’s not that big and he was very gentle and it did not hurt at the time... but now I have a lot of gas and it kind of hurts to poop... I hate to be weird, but is it normal to hurt the day after? It’s not an unbearable pain, just uncomfortable.I don’t remember this happening before