Try looking at these two threads, they may have some answers for you:
Report: Premature Ejaculation, Lasting Longer, Research.
New to Sex - Premature Ejaculations: Is it always like this?
Had this problem a couple times early in my sex life. My solution? Be ready for round two. If you can't get it up again right away, eat her out for a while (shouldn't be a problem, since you're wrapping it, right?) and then when you feel 'up' to it, dive back in. This technique absolutely wipes out any memory of the 'too fast'.