[DanielScott]

Stress can be a big factor. If there is something going on in your life at the moment, even if they're unrelated, it can be a big problem.

You say you learned to get over some of your issues - it is possible that these are not fully resolved and were just "submerged" in your mind for a while. Seeing a sex therapist, or, if you feel comfortable enough, a counsellor/shrink might be your best bet at making sure there aren't any roadblocks you aren't consciously aware of.