So my 3 month old son is constipated.. apple juice doesn't seem to help so what do you moms recommend

Prunes.

try the thermometer trick or qtip trick

A little prune juice or be pear, prune baby food also baby 1oz. nursery water with a teaspoon of little light Karo syrup will help.

qtip trick?

Medical u stick up there butt that helps, it did for Liam .. after 1 hour he is pooping now🙏🏻🙂💚