Pink eye, also known as conjunctivitis or “pinkeye", can be very scary when you first experience it. You will likely feel itchy and uncomfortable, eyes look crusty and red, and be generally, well, blah.
Your cornea (the white part surrounding your pupils) turns blood red or entirely pink—hence the name. But despite temporarily looking like a vampire, you shouldn't worry too much. It tends to go away after a week or so.