NSFW... pls help

Hi guys this is super gross but I can’t find any pics that look similar to what I have but my anus has been itchy and a little swollen and now after a couple days it’s more swollen and like purple/red and pokes out? It used to be just normal no discoloration or swelling or anything and this has been going on for a couple days lol I don’t have any bumps or lesions or anything that I can see but idk if it’s a hemmorhoid or what? I do sit for most of my day in the office, probably sitting down 10/12 hours that I’m awake... Idk what to do I don’t think it’s an STD but it is pretty uncomfortable and ugly... I’d post pics but I’m embarrassed lol