l always go to sleepovers and forget my contact case, what would happen if l slept with them in? would l wake up and be blinded by the dryness? would they get stuck to my eyes? what would happen?

they can sometimes roll back behinde your eye

From my experience when l wake up my eyes are very red with discharge in the corner of them. l would advice against sleeping in them

no silly.
no offense.
nothing bad. just ur eyes would get dry.

WELL THROUGH MY EXPERIENCE ..THEY DRIED UP PRETTY BAD AND WHEN l TOOK THEM OUT THEY RIPED THE CORNEAS IN BOTH MY EYES AND COULDN'T SEE FOR ABOUT 2 WEEKS AND IT WAS VERY UNCOMFORTABLE ..EYES GOT TEARY ALL THE TIME l COULDN'T GO OUT DURING THE DAY CUZ MY EYES WERE SENSITIVE TO LIGHT.. l WOULDN'T RECOMMEND IT

Depends on what kind of contacts u have. There r some that r made so that u can sleep in them. You should look into those.
If yours r not made for that, they will just get dry. You will not be blinded by dryness, just uncomfortable & sticky. If u just take some saline solution with u & wash them off & rinse ur eyes, it will fix the problem. Even if u just put a couple drops in ur eyes when u wake up with them in, it will make it better.
It is not very good for ur eyes though, so do not do it for a month straight without taking them out. It can really hurt ur corneas.