16f.167-130lbs since oct on restrictive diet. Dizzy, eyes black over when standing, sudden nausea/vomiting. Headache sweaty tired.1200cal/day. Tingly body?

Why??? Why the restricitve diet? Are you trying to become a jockey? Or a fashion model? Sounds very unhealthy... And yes i beleive your symptoms may well be caused by resrtictive calories etc. Etc.