I'm really sorry that you're having such a hard time when you're working so hard. It's really tough mentally and emotionally when that happens. We're all here for you for whatever support you need.
As for breaking the plateau, lots of people have success with actually
upping their caloric intake. I know it seems backwards, but the way I understand it (taken from non-scientific, non-referenced internet sources, so take this as you will), when we don't give our bodies enough calories, they actually start storing everything we give it as fat to make sure it has enough energy to keep functioning. It goes into "starvation mode" to make sure it survives.
According to
this calorie calculator, a 25-year old woman (I left the option at default) who is 5'5", weighs 220 lbs, and leads a "very active" lifestyle (according to the calculator's qualifications) needs to consume 2,008 calories every day to lose 2 pounds a week, which is a very healthy rate of loss. By comparison, if you're eating 1300 calories a day, and burning up to 600 a day, you're only giving your body 700 calories to use. It needs them to run its basic functions, like keeping your organs running and your muscles fueled.
I don't know, I'm not a nutritionist, a doctor, or in any kind of scientific field, so don't take my word for it. But increasing your calorie intake for a little bit and seeing what happens might be something to consider.