well you really do need to start eating a proper balanced diet with lots of fruit, veg, meat, fish, nuts, seeds, diary etc.... your body is more than likely crying out for vitamins and minerals and because it anit getting them you are now beggining to suffer for your act.
You can find protein in meat, fish, eggs, nuts which would make a brill meal if you combined some of them together... like tuna, wholegrain rice with a mixed salad and pine nuts.