My LO is 12 weeks today and for the past week or so has wanted nothing more than to chomp away on my finger covered in a muslin cloth. He cN bite down really hard for at least 30 mins at a time or more, and has been very drooly the past few days. Tonight he was crying so I put my muslin cloth covered finger into the back left aide of his mouth to chew on and when I took it out there was a bit of blood. I put it in again & there was a bit more blood. Not loads, but definitely a touch of blood. Could his molars be coming in already? The past few nights he hasnt been sleeping well, and last night he woke up twice and was just screaming. I've given him some Calpol as that's all I've got in the house at the moment What do you think? Is this normal?