Help!!

Hi so to start off, just a couple days ago I got a pimple near my genitals. I get them from time to time so I popped it not thinking much of it. Today I went to walk down the stairs and it felt like someone was stabbing my lower hip. So when I went to shower the skin next to my vagina is swollen and red, and a red line it’s starting to form. I touched it and it’s hot and hard and I don’t know what to do. Does anyone know what this is? And is there anything I can do?