Hi J.,
No progeterone cream should not be causing the headaches. I am on Prolief & I have never had any headaches. I also sell 2 different types of progesterone cream. I have never heard of any headaches.
If the cream is to high of dose or you are applying to much you will get sore breasts. That's a tell-tale sign of an "overdose". But your doctor has you on the right track for getting you on the cream to get pregnant!!! Yea he seems to know what he is doing. Is your cream in a metered dosage pump? If not you may want to switch to something that is, that way no guessing if you are getting the correct dosage.
What about environment? Allergies? Are you getting enough water?
I am a no med person also, unless totally necessary. I am big into holistics, hence my business. And I live an hour from a "medical" center & shopping is 30 min. away. Not quite as bad as you but I feel your pain. I can help you out & have the progesterone cream delivered directly to your door, no into town trips. If you want I can email you the info.
I hope the best for you & your family & hope that you have speedy sucess in getting pregnant. Please let me know if I can help. Take care, G.