Oh....how we wish they could talk! How we wish we could explain to them the ins and outs of our everyday lives - she's still a bit young to have learnt those yet....
She's certainly letting you both know that she's not happy with your husband leaving
Harry's the same when Andy (husband) goes to work - he doesn't pee, but he shakes like a leaf....
I would keep her harnessed and leashed during the 'leaving' times - and also when you have to take her outside to go to the loo. You cannot risk making your back even worse, with constant picking up and bending...I know how it hurts
As ColesMommy01 suggested - can you put a baby-gate at your bedroom door? I've found them to be indispensable - especially when the man arrives with our take-out Chinese dinner...!!!