Ingrown Hair/Cysts???

Okay, I just turned 20. I have been shaving my vagina/bikini area since I was 13/14 years old. FOR SOME HORRIBLE REASON I get these big bumps that hurt like hell. I always thought they were pimples or ingrown hairs, I don't think they are though. If I squeeze one some puss or blood comes out. Anybody know what I'm talking about???? And no, it's not an STI or STD. I've been having this issue since I started shaving, and I'm wondering if waxing will help. I'm almost sure they're cysts.. but what do I do with a cyst? I get them so often it literally makes me cry and I don't want my boyfriend looking down there seeing these ugly big bumps.