Ive had 4 chemical miscarriages is there anything to prevent another one this month if i get pregnant such as different vitimans?

Hormone issue: I am not exactly sure what you mean by the term “chemical miscarriages” but many women with recurrent miscarriages have low progesterone hormone levels that lead to loss of the developing baby, & skilled Dr can consider evaluation & then treatment with progesterone during part of the pregnancy which sustains it. Definitely consult OB Dr about this