Hi! This sounds exactly like the type of headaches I get! I never had migraines until after my second child was born. It was my husband that made the connection of them coming at the time of my period. I casually mentioned it to my doctor a couple of years ago (she a gen. practioner) and she said that hormones can totally be a trigger! I don't get them every month, but generally about every three months. She prescribed a triptan migraine medicine and that has helped TREMENDOUSLY! Triptans are a class of drugs commonly used to treat migraines. I only use it when I really have to (don't like medicines that much in general) but it has been a lifesaver. Some days I would have a migraine for two or more days..it is an awful feeling.
You might also start paying attention to other common migraine triggers and avoid those at that time of the month...alchohol, caffeine, chocolate, etc. and definitely getting enough sleep like one other person mentioned can really help! Good luck!