Our are 7 weeks and are teething. My DD starting teething early too. They are chewing rather than sucking on their pacis, will calm down for a cold teething ring and will chomp on it, and are extremely irritable! Tylenol and teething tablets are our friends right now!
I've read it's as early as 3 months and can last until 15 months. Some symptoms are chewing on everything, general crankiness, slight fever, and near constant-inconsolable crying.
Re: Teething