being poorly, weightloss and starvation mode

staceydeelane

so ive had the dreaded sickness bug lost 2lbs and not water weight as ive been ok for 3 days now but havnt gained it back. im worried though im back to normal exercise i have no appetite and only managed to consume 495 callories today and a few more the day before,my appetite is gone though i have tons off energy
will this set me off track because im not eating much?
at what point will i go into starvation mood if at all,am i in danger of ruining my hard work and slowing down my weightloss if i dont get my appetite back soon