What can I do to get tnto my facebook?

[Lucy]

Ok well all my families computers were recently hacked through the internet by some people from the Philippines. We got rid of all the bugs but mum told me to change every password on my internet accounts. Which I did, except with my facebook account I forgot to write it down and now I can't remember it :/ Daft I know. utB I can't use the email address my facebook is with because I deactivated it ages ago not realising it was the one I use for facebook. So I have a bit of a dilemma, basically I have no idea how to get back into my facebook account without making a new one which I don't particularly want to do tbh :/ Thanks for any help! It is greatly appreciated believe me...