Natural progesterone will also help to sort out your luteal phase.
There is some information on luteal phase deficiency on the Natural Progesterone Support Website - a network for women using (or thinking) of using NP.
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Most doctors will recommend drugs from pharmaceutical companies as these companies market the drugs to the doctors. Most doctors will be unaware of natural progesterone as pharm companies will not make it (natural product so cannot be patented).
Research shows that transdermal cream rather than oral progesterone is recommended, because some 80% to 90% of the oral dose is lost through the liver. Thus, at least 200 to 400 mg daily is needed orally to achieve a physiologic dose of 15 to 24 mg daily. Such high doses create undesirable metabolites and unnecessarily overload the liver.