Not a baby related post, but this is the largest mom community I know. I have a question. I haven't had sex in a long…

Not a baby related post, but this is the largest mom community I know. I have a question. I haven't had sex in a long time, so pregnancy isn't the cause. I've had a lot of joint pain (only 20, so can't be old age yet) recently, along with having a full bladder and needing to pee every 25 or so minutes. I've had a constant headache, and have been really fatigued. Any idea what might be causing this? I've had people tell me the scary stuff (cervical cancer, ovarian cancer, endometriosis, etc), but I want other opinions before I get it checked out....