Does Caffeine Cause Headaches And Blurry Vision?

Hi my name is amanda, and im 30. over the last two weeks ive been suffering with headaches. Ive recently began drinking coffee again after a year absence due to panic attacks. I only have one coffee a day, around 10.30 am (instant coffee) and my headaches start roughly an 45 minutes after and they last all day and night (forehead pain) i get blurred vision with the headaches too. Do you think its the cafeine thats causing the headaches?