Now, there are many ways to regulate the menses and/or to supplement a woman with progesterone. You have been prescribed progesterone only pills, which is fine. A Mirena IUD and Depo Provera
are other alternatives, again, if available. You could also start a estrogen/progesterone containing birth control pill (or alternatives available in your country) if you have no medical contraindications. What has been recommended by your doctor sounds fine.