I am sorry that you are suffering so badly. If I were you, I would call the ER and ask for you record for that night. If they ask why, tell them that you were never told what was wrong with you and you want to know why you are taking the meds you are. You have every right to know what is going on. You could have had a ruptured cyst, or you could have a cyst that is getting bigger. Don't let this go, you need to stay on top of your medical records so you always know what is going on inside of your body. Please keep us updated on how you are doing. Prayers to you!
You probably had a cyst rupture. This has happened to me several times and the pain is horrible! It usually happens around ovulation and is brought on by intercourse or during a bowel movement. This is actually very common, if the cyst doesn't rupture, it usually resolves on it's own.