Ovarian-Cyst.org

I think it might be possible it is the cyst. But there are other things it could be. Common causes of low back pain include lumbar strain, nerve irritation, lumbar radiculopathy, bony encroachment, and conditions of the bone and joints. Other causes of low back pain include kidney problems, pregnancy, ovary problems, and tumors. Uncommon causes of low back pain include Paget’s disease of bone, bleeding or infection in the pelvis, infection of the cartilage and/or bone of the spine, aneurysm of the aorta, and shingles. Check here for more information.

http://www.medicinenet.com/low_back_pain/article.htm
http://www.livestrong.com/article/100932-tennis-ball-therapy-sciatica/
http://www.triggerpointbook.com/backpain.htm