After Butt Stuff??

My boyfriend and I did some butt stuff but all the way butt stuff?!?! We used a ton of lube and prepared well before the real thing went in and stuff (sorry tmi) everything went well and there was no pain or anything other then just a general discomfort?? But it's been a day since and my lower stomach is kind of hurting and slightly bloated? Does anyone know if it can be trapped air in there?? Or a result of going at it too hard? Is this normal??? Sorry I'm just a little worried since this was our first time doing butt stuff