Welcome to PC. I would suggest you at least CONTACT your local hospital's social services. You don't have to make any decisions right now, but they will be there for you... and have helped many in your situation. You owe it to your children (and to yourself) to create a better situation. Of course you're depressed! What a big job you have, plus you may be having residual post-partum depression....

It's a good thing that you've reached out to us here, for we really do care about you. If you can and are financially able, certainly get into private counseling...but at the very least PLEASE call someone IRL to help you think and find what you need to feel better!