Kind of hoping someone on here has maybe experience similar stuff...

I've been with my b/f for 3 years - we were both virgins when we met - and were happy to wait and have sex. But we can't - no matter what position we try to use, he just can't seem to penetrate me, and when he comes close, it causes me a lot of pain. I have no problem with him fingering, or anything else.
I went for a smear test a month ago, and they couldn't even do that, it hurt so much! Said I looked inflammed and all blocked up with discharge, so took 3 different tests, but all came back negative, and gave me thrush medication and some sort of anti-bacterail pill. Well, one of them seemed to work, and I went back for a smear, which they did, easy. Not enough cells on it though, so have to go back tomorrow.
In the meantime though, I have had very tender breasts, which seem to have swollen, heavy discharge, and still can't have sex with my b/f as is painful and he can't penetrate very far.
I thought the breasts/discharge might be becuase i'm pregnant (didn't miss peirod, but was so light it was hardly there, and is usually moderate/heavy), but if he can't get there....
Help! Am so scared, but no-one knows what is wrong!