Please don't kill yourself. Most medical problems, such as the one you describe, can be resolved with the ongoing attention from medical professionals.
If you are having severe pain, please go to your local emergency department. While we cannot diagnose you from here, it could be an indication of an infection, or of ovarian torsion, or an ovarian cyst that may burst. Any of these are treatable, but it is imperative that you seek medical attention as soon as possible.
Have you had some diagnostic testing done? Could you have endometriosis? Please work with your doctor for solutions. And know that you matter. Things can be worked out. You could also consider fertility treatment for a baby to bipass anything else going on.