I have been put medroxyprogesterone for not having my period in 4 months. today i got an extreme headache ,nausea and flushed cheeks and chest.

Progesterone: Jerry, all of those symptoms are common reactions of progesterone. I am most concerned about the flushing on your cheeks and chest as some women can get a severe allergic reaction to this medication. I am not sure how long you have been taking it, but since it is a once a day medication, I don't want you to take anymore until you talk to your doctor or their partner by phone in the morning.