Hi Jagirl,
Normally Nancy would answer this question, but she's in sunny Hawaii right now.....so I'll give it a try.
I am a fellow Medifaster and NOT a health advisor, so these are just my thoughts, not an "expert opinion" or anything like that
Anyway....At 39 years of age, you fall into the perimenopausal or premenopausal age, which means that the women's health formula would certainly do you no harm, and may be beneficial. I, too, am premenopausal, and use it in combination with the other MF shakes and soups, and really enjoy it.
The headaches may be due to caffeine and sugar withdrawl...and should subside SOON. Also, try a little bullion (the salt helps) and make sure you're drinking plenty of plain water.
As for the weight loss....if the products are used according to instuctions, you shopuldn't have any problems.
Best wishes on your MF journey!
Lois