Want to use Minoxidil but if I get pregnant in the future I will have to stop using it and the hair will fall out. Advice?

Minoxidil as you have correctly stated must never be used in pregnancy. The hormonal changes in pregnancy are excellent to support healthy hair growth for many women and generally even women with androgenetic alopecia notice an improvement. You can resume minoxidil after delivery according to your doctor's instructions.

I always tell pregnant women not to use any medications that might impact the baby. Although there are no known hormonal effects from minxodil, it is absorbed into the body and therefore could be harmful to a fetua