cannot access site after edit profile

I’ve had my site starterd and running fine and I was happy last night. then I edited my login password via dashboard > users > your profile. Profile updated, and I closed the browser and went to sleep. Suddenly this morning, as I wanted to continue working my site, it’s unavailable. My dashboard, as well as my site, just poff! gone… as if I never set them up.

So, am I not supossed to change my password?