Like you, initially after my AVR, I started having migraines every few days, which slowly became about once every week or 2 and stayed like that for about a year. I started going to a chiropractor that does not do "major adjustments" like others I have been to over the years. She mainly focuses on stretching and loosening the muscles in my spine and neck. I started going to the chiropractor ever 2-3 weeks and went 12 weeks without a migraine until about 5 weeks ago unfortunately. I have had 1 migraine a week for the past 5 weeks and it has been brutal. I know that is not much help, but might be worth a shot to try and find a reputable chiropractor or even get a back/ neck massage which has seemed to help lower the frequency of my migraines.follow up on my ocular migraines. 4 years post op. Initially averaged about one every day or two. Now down to one every eight or nine days. I do not feel well for a day afterwards. I guess the brain fog thing. I have tried many dietary manipulations (eliminating alcohol, wine, nuts, cheese, artificial sweetners). Initially I was convinced that exercise caused them. Most were occurring with exercise. I have kept a log for 16 months. Quit exercising 5 or six months ago. Still walk or ride a bike most days but slowly and not nearly as far as I was and I don't time it any more. The four months that I have logs for before and after stopping exercise I find that the frequency has not changed. Still get about half while I am outside walking, biking. I live in Florida so it is hot and usually sunny. Some occur when I first start walking and some a few minutes after I get back. Sunglasses don't help and taking water and drinking while outside does not help. In the past when I was walking five sub 15 minute miles, I found that if I continued walking in spite of migraine that I would get a second one either before I finished or immediately after. Still looking for something I can do to decrease frequency. I am interested if anyone has found a trigger that helps. Others have said that beta blockers have helped, but I have been on beta blocker continuously since before surgery. I think that I may start exercising more aggressively again to see if they get worse.