account gone?

Hi, i haven't played minecraft for 5-10 days or so when this happened. When i loaded up the launcher the other day, i told me to log in, i thought "huh, alright i guess this is becuase i havent been on recently (i play every day or so)." i put in my login details and it says invalid. So i change my password and it worked this time, but instead of saying my username (SaltyBush911) it says player and that i have to buy minecraft again. I have owned minecraft for a year or two now so i don't know what its on about. If i try and make a new account with my name it says it is taken so presumably someone/something stole it. I've tried many emails, usernames and passwords but they are invalid. If you could help at all that would be greatly appreicated.