My new boyfriend is really worried about birth control...?

My new boyfriend and I had sex together for the first time last night. During the whole time and afterward he seemed very nervous about me getting pregnant. It was to the extent that I don't think he was enjoying himself because he was so worried about me getting pregnant.

I could understand this if we were virgins, but we aren't (I'm in my mid-twenties and he's in his early thirties, we've both been around the block). I could also understand this if we were being irresponsible, but we aren't. Neither of us have had a pregnancy scare in the past. We have dated a couple of months, we're monogamous, and STD free. Also, it wasn't like we weren't using protection-- I'm on the pill and take it perfectly, we used a condom, AND he pulled out. I could also understand if it was a case where we were teenagers and could not afford to have a child and are still in school, but we both have terminal degrees and high paying jobs. Getting pregnant is far from the desired goal at this stage of our relationship, but we are both at the financial and career stage where it wouldn't destroy us.

Does anyone have any advice on how to help him worry less so he can enjoy it more?