Ramadan Goes Upside Down with School

I've been back in the US for one week now and because of my irregular and inflexible schedule at school Ramadan went completely out of control.

I don't eat enough (lost 2-3 kgms in one week)
I don't sleep enough (5 hrs a day on average)
I don't pray as i would like (no more tarawee7 in jama'a)
I don't exercise (not even once)
& I don't really work

The question is: If that wasn't the case would there be any meaning to Ramadan? Should i not resist?