I got hit with a blueberry.

I know it sounds dumb, but after I got hit by a flying blueberry, there is now a dark patch at the bottom of my vision in my left eye. Normally in normal daylight, it isn't visible, but it becomes extremely noticeable when I go to dark places. I thought I could get away with it after a night of sleep, but its been one and a half days and its still here. What should I do?