Hi I recently had a phase of non specific headaches-no pain centre. They lasted a month. I had a pressure check on eyes at the optician and got normal result, and better than 20/20 vision. GP then prescribed IMIGRAN and the headaches disappeared completely. But ever since I can hear my blood swishing at pulse in my left ear. Always my left ear. Increases at night. I do drink a lot of coffee (single parent and run a business) I wondered if I should be concerned and seek further assessment - and what I might be seeking assessment for. Many thanks