I got this bump on my lip which I've been worried about and thought it was just a pimple, so I popped it (at first it was two next to each other which was weird , after a while it was fine, but then the dead skin peeled off from showering and left a mark. A few days later it grew into a huge pimple like bump, so I popped it, blood and a white puss came out. After that it became hard like on the outside, like a thin crust layer, or just tightened skin appearing hard. I'm worried it's an still/STD, and just need help knowing before I go to urgent care.