Questions about Fitness, nutrition, BMR + depression

danielaica

Hi there,
I had some questions about fitness and nutrition, and then some. Hope some of you can help me out.

I started my weightloss journey a few months ago without the app and managed to lose about 8 kg. I started using MFP exactly 3 months ago and I have lost another 5 kg (but was targeting at a 2 lb week loss which didn't happen).
For 1 1/2 months I've joined a Crossfit community and have been going 3 times a week. There are incredibly challenging exercises as I had not hit the gym for nearly 10 years and they last from 1 to 2 hours.
I'm trying to motivate myself to do some other exercises at home as well... jumping rope, jumping jacks, sit-ups, push-ups.
Now the food... I usually eat salad and pan seared fish or chicken (<200 grams)
I track all my calories and when I have a cheat day, I log those calories and find some low calorie meals for the rest of the day to not pass the 1200 kcal goal.
I must admit that I also have depression, which translates into having low days where I stay in bed for 48 hours and only get up to get food or go to the toilet.
I calculated my BMR according to my low days and I would only be using1450 kcal a day, not 2000 kcal like the app uses.
So my questions are:
1. Can a 3 times/week exercise routine (strength and cardio training) halt your weightloss, can this be due to muscle building, should I try a 4 or 5 times/week?
2. Should I change my goals according to my BMR during low days (I should only eat about 700 kcal to lose weight)?

Thanks for reading,
Daniela