[Coffee.]

I also agree with you and Jenna, it seems very unlikely you're pregnant. In terms of other advice, I really would recommend you use the condom on the whole time or consider doubling with another birth control method. You're absolutely right, pre-cum has no sperm in itself, but that is putting more unnecessary risk especially if you're not using another birth control method. You can check out different methods on this site (some are non-hormonal if that's your concern).