Will pantothenic acid help with my severe cystic acne? Will it effect my burthcontrol or cause me to lose weight? Those are two concerns for me.

No need for it. It is very unlikely that you are deficient in pantothenic acids and taking it will not help acne. Please consult this site for home treatment for acne. http://www.webmd.com/skin-problems-and-treatments/acne/acne-vulgaris-home-treatment.