Hi Stacye
Lemme start with - holy guacamole! Good for you on the almost 80 freaking pounds lost!! You are obviously doing something right!!! Your pics are stunning!
As for the weight gain - maybe sodium? Do you track your calories by writing it down in Fitday or Nutridiary? It's hard to tell what's different if we can't see what you are eating...is it possible you are hungrier because of the exercise and eating more?
While it is kinda freaky that you've gained so much out of the blue....it could just be a normal body fluctuation...it happens.
Maybe it's time to lessen your calories because you are getting smaller and need less calories to get through the day?
I'm just tossing out ideas.
Hang in there girl!!! You ARE doing great - your body will catch up, soon.