Eye discomfort

For a few months now I have had a tremendous amount of discomfort in my right eye. I've noticed an increase in floaters, I've had eye strain, dry eyes, light sensitivity, and my right eye occasionally goes blurry. I've been to two different doctors; both dilated my pupils. The first said that it was sinus pressure. The second said that I had a slight astigmatism in my right eye, was getting dry eyes and should use eye drops. Apparently I still have 20/20 vision though. The eye drops haven't made the problem go away.
I also had my sinuses checked and they're fine.
Are there any eye exercise I should do to treat this astigmatism since the second doctor told me I didn't need glasses?
Secondly, is there anything I can do to make floaters go away? One of the floaters is a clear circle with a black ring around it that always appears in the center of my vision.