I recently went on a 4 day business trip. LO is being looked after by SAHD, had a mix of freezer supply and some formula.
I pumped while away but my stash went bad as freezer pack confiscated 
Since returning my supply has seemed down, LO gulped down a bottle of formula in the night, and my most recent pump gave close to zero
I'm worried my supply is gone, I'm not ready to stop yet
Could it have dried up already? What can I do to encourage supply to build up and LO to rekindle his preference for me over a bottle - I'm worried he's switched allegiance
Any advice gratefully received