Conversations  |  Lose Weight Community Guidelines

Negative net calories

Hi I've tried searching for the answer to this sorry if it's been asked before..on the app when you put in your activities ( including tasks like office work and sleeping) since trying to loose weight it's coming up my net calories are in a minus between -1200 and -1500. is this a bad thing?

currently consuming an average of 800 cal a day.. ideally need to loose 7lb in 3 weeks (preferably more). currently 153lb 5ft 7 age 31 and am doing the 30 day shred by Jillian michael.. may need to up the calories as on day 4 am starting to get lightheaded and headaches .. any more suggestions how I can reach my goal?