Pain in My Ass

26F sorry for the crude joke. For about 3 months I have had the horrible pain near my rectum and/or coccyx. It hurts when I stand up, hurts when I go sit down, hurts when I’m still sitting, it hurts when I poop. When I flex my pelvic floor like I’m “sucking in” my anus it kind of hurts. I got an xray to rule out a fracture, and a high contrast CT scan. They found nothing from either (except liver cysts) and I’m growing concerned that I’m going to have this pain forever. Would this be symptoms of maybe a hernia or internal hemorrhoid? Unfortunately I’m stuck with tricare doctors so I’m trying to figure out how I can get a diagnosis for this because I’ve lost all faith in military doctors. Thank you for reading and please help it hurts so bad!