Hi,
Welcome to ehealthforum.
Since you have had history of ovarian cyst before, consider meeting a gynecologist and not regular doctor for your symptoms. The symptoms of (very painful sex with heavy bleeding afterwards, swollen stomach that makes me look pregnant, sharp stabbing pains on both sides of lower abdomen and general achey pain all over abdomen area) suggest vaginal infection, PID or cervical issues.
You will require further investigations to come to the exact cause for your symptoms to be able to start with treatment.
Take care.