Facebook Account Hacked and Email Address Changed

to whom it may concern, I have had facebook for a while and never had a problem…. although all of the suddon I can not login to my own account my email address has been changed and when facebook tries to identify me it brings up my photo so when I try to loginto it again for a new pass word I think its going to an email that I have no idea who or what they are. this is very important to me and I have been trying to fix it for over a week, pls help me to get onto my facebook page and if need be please dont hesitate to contact me on my new number. kind regards, Hoda Atiyeh.