Just yesterday I was having a little discomfort around my rectum. I realized today theres a half-pea sized bump on the top side of my rectum. It doesn't itch and its not discharging anything it's just sore. I dont think it's an std because I haven't been sexually active for a year. I have no idea what it is or what I can do about it. Please help... I have enough stress in my life without worrying about this. Thanks.