Two, ovarian cysts can cause pain
like that. Three, the red bump made me think of an STD
like herpes, until I read that you're 50 y.o. I could be wrong, but you're probably past the stage of going out and gettin' your freak on with a bunch of guys, so....
That's all I got. You're definitely being proactive and your appointment today should tell you a lot more! Maybe try some laxatives for a while, gentle like Correctol, where it works overnight.