Yael, I really know nothing about fighting, but my $0.02 would be to start shopping and cooking on weekends so your fuel is above and beyond. This I think will assure you continued success without the need for breaks.
I know and hear your life is tough with school and all, but the nutrition I believe is crucial. Actually your school schedule will probably be enhanced positively and stress reduced with the appropriate nutritional choices. Please tell me to go to hell if I am way off base! Just trying to offer suggestions that I found helpful when people gave me the tough love deal...
Check out Robb Wolf from the other day here
. The attachments are where it is at!