Flaring a lot suddenly??

I had an old account where I had posted on here a lot before I was able to see a doctor, well I'm diagnosed now!!! The thing is, he just diagnosed me, knew I was on propranolol already (For previously recognized migraines) so he just advised me to increase salt intake and fluids, along woth exercising more. I was flare free for like two months and the past few weeks I've been flaring a lot. Usually at night. I'll try to sleep and right as I start to drift off I'll have an adrenaline surge and that'll happen every time I drift off for hours on end before I'm able to fall asleep finally. Afterwards I'm stuck with brain fog for a day or two. I was just wondering if there's anything that could bw contributing to specifically flaring when trying to sleep. And another thing, should I ask my doctor to redo my propranolol to 20mg 3 times a day like I have seen other people take? I'm currently on 80mg once a day and it seems maybe it's wearing off around my bedtime and that's causing it.