Okay so two nights ago me and my boyfriend had sex. We used a condom and I am on birth control and he pulled out before he finished but later that night my lower abdomen felt like I was having cramps but after an hour or so it went away. And then today I am having more pain in my lower abdomen that makes me feel the need to pee but when I try only a little comes out and it's painful. I haven't seen any blood yet, but I would just like to know what is going on! Also I have been drinking plenty of water everyday.