My LO has never been a great napper, but the past 2 days have been AWFUL. He will cat nap (max 20 minutes) and the only way to get him to really sleep is put him in his car seat and drive around, after this he will sleep for 2 hours. LO is 6 months. Is this a sign of teething? He's been drooling like crazy for past 2 months and his gums feel harder to me not as gummy as before.. I feel awful he's so exhausted but I don't know what to do.