Or she was a bitch, should of told her you had something else that was fat too.
Start off by tracking your calories, you want this to be a process...not a guessing game.
When you get your food intake consistent then you can start adding in more cardio little by little.
Dropping calorie intake and using high/low carb days should be simple since you are tracking your calories/macros.
Gauge your fat loss with measurements and how you look in the mirror. Taking pictures every week/month.
If you start feeling run down and have been keeping your diet strict...have a cheat meal.
Use caffeine when you are feeling low as well. Good luck.