Sunlight gives my eyes an electric shock?

ok so today i was walking to the store and its pretty sunny and i didnt go to bed last night ive been up for 26 hours but i was walking to the store and i had to keep my head down and eyes squinted if i looked up i got this horrible literly shock in my eyes like it hurt it wasnt like a shock it WAS a shock idk does anybody know what this is or is it just because i havent slept?