Need help identifying possible causes of red bumps

I had protected sex ten days ago during which the condom did NOT break, nor was there any foreplay in which the condom was not used. About a week after intercourse I woke up with a half-dollar sized cluster of small red bumps right over my hip bone, high enough where if I stretch my arms into the air, the bumps are visible. They were a little itchy at first (mostly just itchy after I had scratched them to see if they were tender). The whole bumps are the same color, not so much red as a dark pink, like a mosquito bite. There are more than ten bumps of various sizes, but none of them appear to be filled with any fluid. Today is Sunday, August 29, and the bumps first appeared on Thursday. They no longer itch, and the bumps are nowhere else. I've looked at dozens of pictures of herpes outbreaks on the internet and my bumps don't really look like any of the pictures I've seen, though some symptoms do fit the symptoms described on various herpes diagnosis websites. I'm curious as to what else the bumps could be, and what likelihood it is that the bumps are indeed herpes.

Thanks

[petal130]

http://www.medhelp.org/user_journals/show/140296?personal_page_id=2773