Help! I'm frustrated . . . need advice.

You will have lots of stalls along the way, most people do.  The important thing is to focus on the big picture and be able to see that - overall - the weight is going down over time.  Day-to-day and week-to-week fluctuations are normal.  If you focus on them you will make yourself crazy.  

42 lbs. in 7 week is crazy good loss!  Your body is probably going through a lull right now, trying to catch up.  When you have stalls like this make sure to measure yourself because you're usually dropping inches rather than pounds.   I would MUCH rather lose inches than pounds :-)