The final result of this election is not going to be Clinton 45-trump 37. There is no need to panic now. Her final result will be higher than her August polling result.
So "I Don't Know/No Answer" is not on the ballot?*
*Yes, NV, I know. Shut up.
Just pick Gary Johnson. Get another voice in there. Worried about a wasted vote? You're going to waste your vote if you vote R/D in a non-tossup state anyway since your vote won't matter there to turn the tide. But voting Johnson this time could change a lot for elections in the future if nothing else.