Bump on Vagina Filled with blood and fluid sometime after shaving....Any Suggestions?

I recently shaved about a few weeks to a month ago. Some bumps have a head that’s filled with puss and others don’t. It’s never a cluster of bumps or anything. They come as single bumps.. After a few days they go away on its own. They never come all together at once. The last two I’ve had have been quite big. The first one was near the bottom outside of my vagina near the lips. After 2-3 days, it had a head, so I popped it, cleaned it and it went away. A few days later, a second one comes. This one is in the middle on the outside of my vagina but in the crease of it. It’s small in the beginning but after 1-2 days, it became huge. It went from the size of a pea to a quarter but I can’t tell theirs some fluid in it when I look at from the side. I am a plus size girl, so I’m assuming it became so big due to moisture and being in a space that can’t really get any air. I’ve been taking hot baths to help with the pain. The only time I can feel when it’s there is when I’m walking or need to sit down to use the bathroom. It’s been less than a week, but this has no head so I decided to pop it. What’s coming out is blood and some fluid. It looks oily almost. I’m use to seeing white puss, so does anyone know what this could possible l be? Side Note: I know that a lot of times people want to know if it can be anything as far as an STD and i haven’t had sex since November