visa cancelled

I would suggest speaking to a lawyer about your situation. My main concern here is why/how the Q visa ended up being "canceled" before the expiration while you are still here - this is confusing to me. Also, your boyfriend/fiance's status (citizen, permanent resident, nonimmigrant) isn't clear from your question.

I would really need to know the circumstances surrounding the cancellation in order to properly advise you

Normally, if marrying a U.S. citizen, it's only important that you entered legally - even expiration of the visa or unauthorized employment won't impact approval as long as no other ground for exclusion exists.

For marriage to a permanent resident or nonimmigrant, though, it would become important to submit forms while you are still in status (if in fact your are still in status now - this just isn't clear without knowing the circumstances of the "cancellation.")

Speak with a lawyer - quickly - to figure out your situation.