I ask this because yesterday the entire day since I had woken up my neck had hurt, I tried my hardest to make myself have an LD or at the very least remember my dreams. I didn't do either, could this perhaps be because of my neck hurting, or me using a heating pad on it while I slept?

Or would none of this matter since you don't hurt in your dreams. =D
But I feel it did make me significantly more uncomfortable, and it's definitely harder to relax and be calm when you can't turn your head.