What Causes Frequent Headaches,ringing In Ears And Rapid Heart Beat?

Hi I recently went to the eye doctor for a yearly examination and I had bleeding behind my left eye, so my eye doctor referred me to a retna specialist. The Retna specialist told me to stop lifting weights because I could have strained my eye and had me taking aspirin every day to thin out my blood and to avoid clotting. I had my blood tested and everything came back negative. I noticed about a month ago which was the week after I saw my eye doctor that I was getting headaches daily. All of the sudden last week my ears have begun to ring then a couple days after that I have felt shaky and when I lay down I feel my heart beating faster and sometimes feel twitching in my arms and legs. I have to be honest I have been very nervous that something is wrong because I look things up online and looking at all the results freaks me out.