Treatment of luteal phase defect w/clomid and progesterone?

I have been experiencinting from 5-10 days before my period for the last 2 years. I have been ttc since going off birth controll pills two years ago. I have went through a series of blood work and ultrasounds to ensure that there are no polyps, etc. that are causing the spotting. My doctor has said that I have a low FSH level and that the progesterone level is also low. I know that I am ovulating each month, but the doctor believes that the FSH level is not making a mature enough follicle. I am in my second cycle of clomid/progesterone treatment. My first cycle was not successful and I experienced spotting starting at 9 dpo, which is similar to cycles without any medication. Should it take more than one cycle to show any change or progess in the spotting? I am just wondering if this course of treatment will work since I have not seen any changes. Any one with any advise or similar stories?