Hi, I have worked out that exercise is causing my headaches and migraines to the point now that when I go for a 30minute walk I get a shocking headache. If I run then that will then give me a migraine about 15-30minutes later with aura/nausea and the after headache lasts for a good couple of days. I have had a heart exam (TOE) to see if there was any holes as with new study there is a correlation between holes in the heart and migraines - my results showed a very small hole but not significant to patch??? I also had an MRI to see if the brain was being affected but this came back clear. Dont really know what to do now as I used to be a very energetic and fit person but I do not want another migraine so I have turned into a couch potato...I only have one wish and that is to rid the migraines...doctor has given me SANDOMIGRAN TAB 500mcg..as a preventitive..what now ?