How to get my hacked facebook profile back

Hello,
my facebook and email has been took over (hacked) by someone in romania, i have has my old account since i was 17 and im now 24 so it has a lot of my friends on and pictures of children.... im worries what they might do with my photos.... and i forgot to say i live in uk and havent traveled anywhere for the past 2yrs so i know i havent left it on...

please try and help me get controll back or deactivet my account