Constantly changing password

Hi, I don't know where to put this kind of isue...

I've just launched minecraft, and I was logged out, so I typed my name/email and password, but it said "incorrect password" so I requested new one like 10 times, and I just can't log in even if I use the new password...

Is there anything that can cause something that just doesn't let me log in or change my passwords ?

• Noone had never access to my mojang or minecraft account before, this isue I've experienced before, but I could log back in, now I just cannot

(sorry for my bad english)