I can't stop crying

So I told my husband that he needs to start following through with what he says he is going to do. He then told me that he isn't coming home after work and that he is quitting his job so that he doesn't have to pay child support for our 3 and a half month old baby boy. He says I bitch at him too much but all I ask of him is that on his days off he helps around the house or he watches our son so that I can clean around the house,our son is a very needy baby and lately he hates being worn. So it's very difficult to clean when I'm home alone with the baby. So now my husband left and my son is asleep and doesn't know that he will never see his dad again. I don't have a high school diploma because I was in foster care and I got kicked out of my dss custody when I turned 18. I wasn't able to get to school because it was 45 minutes away from where I was living at the time. I'm on social security income. Any job that I will get won't be enough to pay for rent, daycare, groceries and bills. I don't know what to do anymore.