What does my dream mean?

Sounds like you are stressed to the max about money and are fearing for your stability in life. Possibly fearing that your family may fall apart due to all of this.
Take a deep breath. Realize that everything happens for a reason even if you cant see it right away.
and that sometimes, a dream can be just a way for your brain and soul to release stress.

We play out our worst fears in our dreams sometimes.

The dream seems to suggest that you have lost something precious which may indicate the element of separation from your husband and your concern about other aspects to your family life. You appear to have taken desperate action to remedy the situation but it either failed or your move was discovered.

That's my best shot!

first your family is in relaxation, you love everything going on and you are at your happy moments, then you starts to worry about your kids . the nanny represent the troubles trying to take your kids away form you but you being a fighter reacts quick and was able to save your first child. then the trouble persist with your second child and you still hold your confidence . then you worked hard and got enough money to save your child but on the way some other kind of problem arises and u use the money u gathered which bring you back to trying to make some more money to replace the one u previously lost. while you are still struggling to make the money , your husband was supporting you too , and the credit card change means some other obstacles preventing you from taking care of your child. this dream may be a picture of what is to come in the future ( your child might not be grabbed physically but u know it might be something like sickness) . since our dreams are the pre-amble of our thoughts it might also be that you are worried about losing your family especially your kids to some arising problems.