OK whats in my eye? WTF?

Ok so about an 2 hours ago I was just laying on my bed and BAM out of nowere something was in my eye. It hurts like a *****!!! But whenever I open my eye it doesn't hurt, but then when my eye is closed it hurts.... well only if my eye is lke moving around when my eyes is closed. And when I blink... the pain is like unbearable. I think its on my upper lid because it feels that way and when my mom checked my eye, she saw nothing on it. Also when I lift up the lid away from the eye, it doesnt hurt. She tried to wash it out with eyedrops and I tried the whole thing when you set your eye in a gl of water and blink in it and nothing happened. It hurts so bad and it's been two hours!!! How can I get this thing out?? Please help!! And does anyone have any idea of what could be in there?