I am so sorry that you are going through this, my dear. I hope you can sell the house and car and come out of this with some of your credit intact. Unfortunately, sometimes we can't sell off in time. Have you sold any collectibles, furniture, clothes, etc. ? You will need to travel light for a while anyway, so downsizing could generate some needed cash right now. Can you and the baby move in with family for a while, until you can get back on your feet? Can your family help you with a good divorce lawyer? The way that man abandoned you and the baby will not sit well with most judges, so you may get something from him in the future.
Just remember, you will get through this. Try to get someone in your family to watch the baby, so you can get back out there and earn a living again. Once you get past the divorce, and have income again, you can rebuild a life for yourself and the baby. You need the support of your family right now, so don't be too proud to move back in with Mom and Dad for a while. Sometimes, we have to fall back and regroup.