I Have Been Cramping & Having Lower Back Pain For

I have been cramping & having lower back pain for over 24 hours severly due to menstration. Today, I stretched on a foam roller because my lower back hurt so bad. After I rolled on each side of lower abdomen. All of a sudden I stood up and burst of a ton of blood exploded out of my vagina and passed through the tampon. The doctor has seen cyst on my ovaries in the past. After this incident, th pain has gone down signficantly.