ok my gf and i have been having sex for about 6 months (we were each other's first.. yay :P) anyways... i notice everytime we have sex, that the bottom of her stomach will rise up a little bit whenever i am going in. she says sometimes, sometimes!! experiences a little discomfort during sex, and a aching discomfort 5-10 minutes after sex.. i'm not really big.. 6 1/2 ish in length. she obviously doesn't like the discomfort.. but she says it only happens at certain angles.. but even so, can anyone tell me what is going on? any advice/help would be appreciated.. thx!