My migraines usually appear 2 days after my period starts

Mine started that way 30 years ago. 2nd year. Imitrex came on the market. Even only as an injectable (cause flushing, nausea, etc that doesnt happen at lower dose tablets), it was a life saver. It even helped eliminate my 3- year- long chronic fatigue. Imitrex isnt for everyone. I like it because it works. Migraine gone 95% of the time in 1 hour. But, i also like that i can solit up the 100mg to 25 or 33mg and steetches the 9 allowed for the month by the insurance to all month abd at about $15.