The pregnancy has been full of nausea, not being able to eat. I am losing weight because of it which…

The pregnancy has been full of nausea, not being able to eat. I am losing weight because of it which is not a bad thing according to the dr. I want to make sure when I do it I am nurturing my body and baby.

How much should I be eating?

I want to keep track of it should I use lifesum or cronometer?