If you have hsv1 already (I'm assuming orally?), it would be very, very unlikely that you'd get it again genitally. You have antibodies that protect you from getting it in a different location.
Hsv2 is very rarely found orally, and since you only had oral sex, this wouldn't be that.
It could be bacterial. You should let a doctor check it out, and do it soon. The more it heals, the harder it is to diagnose. If you have a foreskin, it could be balanitis, but a doctor really needs to see it.
Let us know what happens.