Idk if im fired

Okay, I've worked for McDonald's for about two years and have never had any problem. I've always been a great worker and always been told I was a hard worker. My boss, out of no where put me off the schedule for a week and didnt tell me why. I went in one day to ask why and he said he wouldn't tell me and treated me like trash. I called corporate and they said they would call me back but never did. I have no idea why I'm fired or what I could have done. They never even told me I'm fired officially but I'm pretty sure I am. What can I do ?