Sky,
I don't know your whole story. However, I want to clarify what you said about the hysteroscopy. There are diagnostic hysts and operative hysts. A diagnostic hyst, which is almost certainly what you would have, is an in-office procedure & a tiny camera is inserted through the cervix so that the doctor can have a good view of the uterine cavity. No anaesthetic is required although a nurofen is a good idea! In an operative hyst, the same thing happens but it takes place in theatre, under a general anaesthetic, and the doctor uses the scope to guide surgery. Sometimes if there is scarring at or near the cervix (eg if you aren't having AF), then an in-office hyst isn't possible & it HAS to be done in theatre--too painful otherwise!
I would not hesitate to have the diagnostic hyst. It can only give you answers. And coming off your cycle is the best possible timing. None of this means you will have to schedule surgery.
Have to go, but please post again!