Exercise, Eureka!
HOLD ON
Before you scream "I CAN'T EXERCISE ON MY PERIOD", I hear you.
I can't either, so please calm down...

But before your period starts is a different story:

3 days of exercise a week (30 minutes minimum each day, 90 minutes total) can actually reduce your flow's heaviness and lessen cramps. If you do the minimum, that's 9 times total over the 3 weeks leading up to menstruation. Not too bad, right? Even something like a walk helps.

I thought this was bull, but upon trying it in the month leading up to Hell Week... It actually worked! I've barely had any cramps (usually I'm dying of them for the first two days), my flow is a little lighter, and I've actually noticed I feel less bloated/lethargic.

You can stop exercising during the first few days of Hell Week, but after it's calmed down pick the slack back up because this works ridiculously well for most people.

Plus, there are other health benefits like a strong heart, powerful lungs, muscle tone, etc... All kinds of good stuff.