Annoyed

Judging by the amount you wanted to lose and the fact that the diet is doctor-approved, I'm guessing it's too low for your body to agree with for that long and your TDEE has probably lowered in response.

I'd zig zag my calories or even take a week of eating at maintenance, etc. Let your body know that it's going to get some really good fuel on some days (1 day?) a week, or for a week (or longer?). If you can trick it into thinking you are full and fueled often enough, it will be less likely to slow in response to your diet.

Yes, it's the 'eat more' answer But I don't know that it has to be every day or anything. A re-feed day might do it. You'd just have to try as far as I know.

If your calories aren't too low, you can try keeping the same weekly average and just zig zag them. But if that makes some days go ridiculously low, that's no good.

Sounds like you're due for a reset. If your body has adapted to your workouts and diet, that could be the reason. The only way to really find out for sure is to reset, or reboot yourself. I suggest shaking up your diet for a week. Drink tons of water to get rid of the impurities and curb your appetite. Increase protein and carb intake. Stay away from fruit and all sugars. Eat lots and lots of veggies, and NO juices of any kind. ONLY WATER! This will shake your system up and put you back on track if you're still doing your exercises. It's tough, but if you want to keep on your journey to achieve your goal, then it's gotta be done. Good luck!