The issue at this point doesn't seem to be about the virginity or lack of it. It seems that the problem now is the obsession over the thoughts. And frankly, we on a web forum are not going to be able to help you too much with that. In fact, by asking the question on here and reading the responses, it just gives you more to think about. Which is what I am sure is the thing you would least like to do. The obsession with these thoughts will also hurt your "performance" with her, if you try again.
I would actually suggest going to see a counsellor or therapist. Talk it through with them. They may have some techniques you can use to try to alleviate this obsessional thinking.
Good luck.
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