I have a 1 month old , i have 3 other kids but my 4th one has been really hard. Im pretty sure its the formula ive tried gentle ease , sensitivity both of them have made his stomach upset and have bad gas . Im not sure what formula to try i dont want to keep switching. He screams like hes in pain its a daily thing ive taken him to his pediatrician and she says since he's gaining weight he's fine and im dealing with ppd and having a baby who's screaming in pain and i cant help is very overwhelming