Changing facebook password!!!!!!!!!

This is the lamest post but Im at the end of my tether. I can't connect Canva to my facebook because the password doesnt work and I can't reset the password. Facebook only lets me log in with a code. It sounds silly but after logging in via code when i try to reset the password it asks for my previous password, which no longer works. Facebook doesnt have a live help. I go round and round and I think its time I ask for help. It will probably take someone that knows 5 minutes but I have spent hours and I'm concerned for my mental wellbeing lol.