I know this is not a physical issue as I've been to the ob/gyn and my lady parts are all normal.

I've never been comfortable enough with anyone to orgasm, and I am currently dating/sorta/kinda in a relationship with T whom I've known for two years now. We had sex for the first time and it was great. I've had casual sex and hated it, but sex with T was good even though I did not orgasm.

When he was performing oral sex it started to feel good, but when the feelings intensified it started to make me feel really uncomfortable, like it was too much. It was a feeling like I wanted to pee or and almost like a feeling of pain or discomfort.

The same could be said for intercourse. He's pretty big and I like that, and I think he could have used some lube but once the orgasmic feelings started it became really uncomfortable.

Any ideas why?