My little one is 7 months old as of the 10th. He has been a great sleeper since birth! The last three nights have been horrible!! He wakes up almost in a scream cry multiple times a night. Last night he cried for about 20-30 minutes straight. I ended up giving him Tylenol because it looks like his two bottom teeth may be coming in. He has been a little more grumpy then usual and wants to bite on everything. Anyone else experience or experiencing this now? How long does this last? What did you do to help?