..on the 3rd row thread started to pop out.. On the back of your sandwich or the top? If it is the bottom, the thread tension on top is not working properly? Make sure nothing is stuck in the tension gage and rethread.
The thread broke...Sometimes you get a thread that makes a little lint ball behind the needle and it will break the thread eventually. Sometimes the only solution is to change thread. If you are using thread the has the little slit in the spool, make sure the thread is not catching on it. Hope you can find the solution. It's so frustrating when FMQ is not going well!