OK I'm 18 years old and just recently, every now and then, I get a couple bumps on my vagina and they blend in with the skin but when I touch them I can feel a bump underneath the skin and they're very very painful until they I guess pop themselves after a day or 2 and ooze blood and pus. I've only sex with one person and it was almost 6 months ago and I've just been getting these recently so I don't think.. well I hope it's not an STD... I've never been to the gyno because I'm still a little nervous and I'm really embarrassed to ask about this so I'm kind of hoping I won't have to. It's just really freaking me out a little bit so if you could please give me an answer I'd appreciate it.

This could be an STD, or it could be a Bartholin's Cyst (which itself can be caused by and STD).

Bartholin's Cyst link:

Bartholin's gland cyst (http://www.healthatoz.com/healthatoz/Atoz/common/standard/transform.jsp?requestURI=/healthatoz/Atoz/ency/bartholins_gland_cyst.jsp)

Anyway, the only way to know for sure would be to get tested.