Please help, personal problem?

Okay, I have a weird problem. Sex doesn't feel all that good to me. I have been having sex for awhile, but it doesn't feel all that great. I still have a little pain when my boyfriend first penetrates me, but it's extremely brief. To be honest, i get pain in my abdomen at times. And there are times when it feels kind of good, but not for very long and it's only a little.It feels almost like i'm dead or something. Before anyone makes any mean comments about my boyfriend's size, he is actually about 7 inches, so no it's not that he's small. Is there something wrong with me? Is there a simple solution or explanation? Will I be this way forever? Also, I know I should go to the Gynecologist for better help, but it'll have to wait a few more weeks until my insurance kicks in. help?