My boyfriend and I had anal sex for the first time last night. We did research so we knew what we were doing. I was really relaxed and we used a lot of lube and he used his fingers first to stretch me out. I felt no pain through the whole thing. But today there is swelling around the entrance and some semen is leaking out. I also have terrible gas. My question is, are my symptoms normal? How long will it take for the swelling to go down? Thank you!