Yeah, I bet it's all in your head. I had a similar problem after I broke up with my wife. It had been so long since I had any strange pussy and I was worried about my performance. After relizing that the women were totally getting off when we had sex, my confidence was back and there have been no "problems" since. At the time, (5 years ago) I talked to a friend about it. He told that he had had the same problem. His solution was Viagra. It helped him stay hard and he too realized that he was still hot and got his confidence back. I didn't try the Viagra thing though. I had used once before and didn't like it.