I'm with Matt. 32 lbs in 1 month is awesome! Why fret about something before it happens?
I also was never advised to monitor my macro nutrients. Here's what I was told:
Get 45-60g of protein every day. *Sometimes I do, sometimes I don't. I don't sweat it.
Try to keep complex carbs "low", but they didn't specify what that is. From others, I set my own threshold on that at 25-30.
Get minimum of 8 glasses of water per day. *again, sometimes I hit that, and sometimes I don't.
Matt's also right about 400 calories being mighty low. Aside from my immediate post-op recovery, I don't think my caloric intake was ever THAT low. Eventually your body will think it's in some sort of starvation mode and stall your progress.
I try to NEVER compare myself to others. My journey before, during, and after has been my own and unique to me. Comparisons only set me up for emotional distress and lead to failure.