(((((Can'tstopCrying)))))
This has happened to me on occasion too - it sucks when it happens, but it always goes away.
I think you've had SO much going on in the past few weeks and been trying to hold it all together, this may have just been your body/mind's way of letting out some stress. The only time we relax is when we're sleeping. Don't see it as a setback...you have been doing GREAT and you will continue to get better!