painful sex

Kayt
I've just gotta lay everything on the table for this one and maybe someone can relate and help me out. Sex is painful. It didn't used to be painful, I have narrow hips so it can be uncomfortable sometimes but it is flat out painful lately. I've been going to the doctor and have had all kinds of exams, tests, appointments, and even an ultrasound and still no diagnosis. Has anyone else ever had this happen to them? I'm in desperate need of some help and I don't know what to do. I feel bad for my boyfriend and then he feels bad for me and at this point I'm extremely frustrated. We've tried lube but that wasn't awesome either so maybe I need to buy a different kind? I don't know. Any help would be so awesome.