Everytime I sit down my side hurts...?

really bad. By side, I expect I have pelvic dull pain (sorry I've just call it that for years) It goes away whenever I stand up or don't bend at the hips, but as soon as I sit down, it begin to hurt again. It's only on my right side and it's unlike any affliction I've ever had. And I own had cysts and own endometriosis. What could this be?
Answers:

I think i get my period today but i dont know because i hold like a red discharge or a shadows colored discharge.

You could have cyst again. I hold ovarian cyst and I have alike kind of throbbing. It feels resembling a stabbing pain or a twitching discomfort. Somewhere I heard ovarian cyst and endometriosis turn hand and appendage.

My girlfriend has heaps pimples on her bottom. How can I make them travel away and stay away?

It could be scar tissue or adhesion within your abdominal cavity from endometriosis.

My time for this month still hasn't come - any suggestions as to why? Please help!?

How long own you had it? If it have been recent it could possibly be your appendix

How much would this hurt?

I'd engender an appointment to see a doctor.i don't know what it could be, but i would go to the doctor.sorry i couldn't give a hand much.