1st Date Night- FTM

}i{ • Married ~ FTM
Our LO will be 11 weeks and mommy & daddy had a planned out date night (concert) . This will be the first time I will be leaving our little one for a long stretch. Besides being nervous about it, my milks supply just decreased this week (go figure) baby is EBF. 
Question, how do you mommies deal?! And if you EBF and you're not pumping during a long stretch what happens to the milk?! Will it disappear? Usually (prior to the dry spell that happened Sunday) I would engorge when they filled up or milk away on the booby pads. Next, how do you not break down?! I've gone to the store for 1/2 HR and I miss my baby & get teary eyed. 
TIA ladies. 💖