I get this pain quite often regardless of the weather however colder weather makes it worse. I do have herniated discs in my neck and lower back. Perhaps you slept of your neck the wrong way. You might want to go to your doc to rule out the possibility of herniated discs. I also get charly horses and it could be that your muscles were strained from the charly horses. I can truly relate to the problem you're having.......one of the millions of fibro symptoms. Hope you're feeling better real soon!View Thread