My baby is 2 months old, she sucks her finger even after breastfeeding. Is that a sign of teeting? If yes what to do?

A. Siri where normally start after completing the age of three months only but there is a very very rare case that year can start by the age of Thomas also but also at the same time I would like to tell you taking hand into the mouth is a completely normal phenomena bed K is it is not necessary that it is going to be associated with something or the other