I know how you feel I still freak out when Charly doesn't poo for a couple of days as she goes very day (just starting solid so is changing to every 2 to 3 days). Charly is a regular farter just like her dad. When she didn't go after a couple of day I would give her some boiled water, amazing how well it works, ever when is only a couple of mls.

Hope this helps.