Can I be fired from work for having to go to the restroom after they didn't give me my break and a late lunch?

I was in the liquor store without a break from 11-4:50. I wasn't given my usual break which is two 15 minutes and an hour lunch. I called around 3 to get a restroom break. They had no cashiers working to break me so I held it until 430 when I had to go. Immediately on top of this, I was forced off the register due to lack of break which forcede to get a lunch finally. So finally I locked the store down turned off the lights and used the restroom and came back within 7 minutes. Worked the rest of my shift and got fired for locking up the store.