It is very unusual for a simple ovarian cyst
to cause pain radiating to the buttocks. You can have abdominal pain
with large cysts and the pain can sometimes be very severe if there is "torsion", that is, the cyst twists around itself. Also sometimes the cyst can rupture, causing severe pain
in the abdomen.
Do make an appointment to see your doctor,who will be able to advice you better after examining you.