@jaedynsmommy, Buy infant gas drops on the bottle it says how much to give them by how old they are of they an infant it will say give them 0.3 if there 6/7 months or older you give them 0.6 it even has the marks on the medicine tube ...
It says on the bottle of drops when you buy it how much to give them for their age. They can be newborn, had to do it for my daughter when she was only a few weeks.