You didn't give your age, that is one way my Dr diagnosed me with PFO. I would get an immediate dibiliating headache after walking, swneezing, coughing, bowel movements etc. You can look up PFO and migraine on google, Cleveland Clinic etc. I had surgery to repair mine 9/29/09 and haven't had a migraine since. I did have daily migraines and they become worse in the 30th and 40th year of your life if its a pfo. You could mention it to your Dr and see what he says. There is lots of info on the internet about
it.