I have had something in my eye since about 12 last night, I've slept and cried since and it still hasn't come out, I think it's possibly just an eyelash but it's round the back of my eyeball

If it was round the front I could get it out but it ain't showing any signs of budging!
I'm just planning on leaving it to work itself out, hoping it does, am guessing that's ok to do. My eye was a little red this morn, don't want it to get too irritated...
Usually these things are only in for a few minutes not half a day!