i STAYED AT SOME OF THE HOTELS IN NORTH CAROLINA EARLIER THIS YEAR DO I GET A DISCOUNT

Not sure, best to call and ask.

probably not, one thing has nothing to do with the other. You will get choice rewards points

Yes

Comfort Inn has a card that you accumulate points which in turn I believe you can turn in for future stays or discounts. You have to have the Choice Hotels Card. Its free to sign up. Its not a credit card. Hope this helps.