I completely understand your dilemma, being a mother and wife, and life takes over too often.
I agree that this diet takes some IT'S MY TIME to take care of myself attitude. I have made it clear to hubby and kid that when I get *****y, deal with it. If I ask you to leave the room, do it. (usually when they are snacking in front of me). And yes, dealing with sick kids is not easy.
My suggestion, and what I do, is stock up on extra food. If your IP clinic won't sell you extras, order some alternatives from Diet Direct or Nashua. Because I never know how busy I will be one week to the next, I can't always get in to see my coach, so I have a nice supply of 100% OP alternative foods so I don't ever run out.
Get back on plan as soon as you can, and know you CAN DO THIS! Setbacks happen for different reasons, but you can't just throw in the towel, and plan ahead for the next time life gets in the way of taking care of yourself.