Sounds like early signs of blindness from mastrabation.
You already went so far as to need contacts.
Just kiddin...you need to see a real doctor with those symptoms. I had a stroke in 1990. I started having a real bad headache first. Then I got to where I couldn't talk. B.P. went off the chart before they got me to the hospital. Was in a coma for 4 days.
I ended up with very little residual damage but most aren't that lucky.
Best of luck to ya,
Jeff