Hi my Ds is 3 months and I had the clinic nurse come out to see us today and I asked her about what i thought was just his first front tooth coming through, but it wansnt- its pretty far back in his mouth and she said that it was the bottom K-9 tooth.. is this normal to get as the first tooth- cos she told me the front 4 are the first to come- should I be over concerned about this?I was think of going to see a dentist but hes only 3 months! :-k