Vitamin c

Has anyone tried vitamin c? I was on it last month because my toddler had a cold and wanted extra immune health. I did end up pregnant (it was a surprise) but miscarried. In reading mix reviews on it.. I read it helps aid in pregnancy bc it raises your progesterone level, I’ve also read it can cause an abortion?

I do struggle to conceive so this pregnancy was a big surprise. If I try again I’m unsure if I should go on the vitamin c or avoid it. Or go on it till ovualation.