No sleep, no hunger

The past fours days have been very weird. We can't figure out if it is apart of his growing up or if he is not keeping well. His activities seem quite normal. He crawls up and down a zillion times. From a totally non-fussy eater, he has turned into one cranky monster. He just refuses to take any food - no milk, no water, no solids. He just finishes about half his bottle and maybe 2 spoons of carrot. I can't quite recollect the last time he had proper dinner in the past week. I find it hard to believe that a kid who would crawl quickly to me at the sight of his bottle or cup now has such a huge aversion to food. He tries toppling it or starts beating me once I feed him. Its been impossible to hold him. He goes to bed at 7:00 p.m. which makes him wake up at 4:30 a.m. Quite tiring to keep up to his schedule now.
Suspecting a stomach bug, my mom suggested I give him 2 spoons of omam (ajwain) water with a little sugar. This seems to have helped for now.