Small bumps on vagina...herpes?

I have an STD exam set for today, but I'm driving myself insane trying to "self-diagnose" what is wrong with me.

I think i may have pubic lice or even scabies..but i have tiny tiny bumps, almost like little bug bites, on the crease where my thigh and pelvic area meet. they aren't sores, pimpes, or lesions, just tiny tiny bumps..no "head" on them. also, at the roots of my pubic hair, there are tiny white balls, not attached to the skin but to the hair. and they r itchy

when i'm close to my period i get a rash down there which sometimes spreads up near my anus, and some lumpy greenish-yellow discharge from my vagina...

so thats scoop really...like i said, i have a test today..but any thoughts or ideas on what this might be is greatly appreciated...