I regularly get headaches right before my period and then feel awful when it arrives. Eg, last week when it started I woke up and struggled to get up. My head felt really fuzzy. This lasted about an hour, feeling like I might faint. It eased off after that but still felt wobbly for that day and the next and I couldn't go to work the first day Obviously I can't be off sick every month.
Is it worth talking to a GP. I went a couple of years ago when period started being every 3 weeks and heavy and was told I was too old/overweight for birth control to manage that.