Low progesterone

Kay
Hello Ladies!!! My husband and I are both 35 and have been ttc for 2 years. I have 2 daughters from a previous marriage ( 12 & 13) I took clomid CD 5-9 got my O from OPK on Friday. Have any of you had regular periods always have a surge with OPK , but have low progesterone. I keep reading about women on clomid to help with ovulation, but I'm pretty sure I don't have an issue there.. I guess is there anyone else in a position like me?