I have had cluster migraines for 20+ years. Recently during the last month long bout of and on, I have had a sinus issue that seems to be producing low grade migraines. Same duration but less painful than a standard migraine. Could all my issues with migraines stem from sinus issues? I usually get sinus blockage from a migraine but lately it seems to be the reverse, sinus blockage producing a migraine. Have I been interpreting these wrong this entire time?