I've been having nightmares every night for about a month. I wake up 2-4 times a night from them?

Deficiencies of B vitamins have mostly psychological symptoms, so the first guess would be to try B-100 pills and see if that helps. The first line of defense against depression and anxiety is B vitamins. Vitamin B2 is a water soluble dye that turns urine bright yellow. When the color fades, it's time for another dose. Read some books about nutrition so you know how to eat right.