My left eye hurts when i blink.?

out of no where 2 days ago my left eye started to hurt. i thought it was no big deal, but its actually distracting me now. my eyelid looks swollen and it hurts to touch. my eye is not red, and my eyesight is still fine. it also hurts to blink. i dont know what is wrong but it is starting to really hurt. i dont think its bad enough to go to a doctor because they wont do anything.