Last night I noticed a fairly small (about the size of a pea, maybe a little smaller) pimple like bump on my vagina, on the outside of the lip/folds area. It isn't very big in diameter, but it seems to be raised pretty high off the skin. At first I thought it was a wart because it looked more fleshy/whitsh colored than red. I want to stress that it resembles a pimple, but does not obviously look like one to me...or I wouldn't really be concerned. Today It seems to be more red (but still a little fleshy colored) and appears to have a barely noticeable *****, whitish head, that has gotten more noticeable today, but is still not clearly defined. As far as I can tell there is only one and It doesn't itch but it is a little tender if I touch/rub it.
I am extremely worried because a little over two months ago I started having sex with a new partner. We've definitely had unprotected contact with our genitals (starting two months ago and as recently as three days ago) and I'm worried this might be an STD. I did shave around that area (but I don't think that specific spot) a few days ago and at first I thought it was probably an ingrown hair, but there doesn't appear to be a hair follicle there, or an ingrown hair to speak of. I'm also worried because my roommate has genital warts and I started wondering (and I'm sure this is ignorant)if I could get genital warts from sitting on the same toilet seat as her, or if we shared soap or towels?
I can't remember ever having anything like this before, is it possible this is herpes or genital warts? Could it just be a pimple or ingrown hair? I read about something called hiradenitis suppurativa too, where sweat glands get clogged, could it be that? Would it hurt to put some neosporin or bacitracin on it to see if it goes away? I don't have any other symptoms (as far as I know) common to herpes or genital warts, but I am terrified that I have contracted an STD!!! If it is herpes or warts, can it spread if I touch it? Please any advice would be very much appreciated!!!