A.S.
It should say on the paperwork if you are to include household income or just your income. If it does not, call either an attorney or the child support office and ask them.
I'm not sure how things are calculated in your state but in most states your income will be imputed if you voluntarily stopped working rather than became unemployed through no fault of your own. However, there is usually an exception if you are caring for the child(ren) who is part of the action because your skill set doesn't allow you to earn enough to pay for child care.
As to your ex's unemployment, if it has run out and he is still unemployed then he can have the support lowered or suspended. Again, it is based on your particular circumstances. Some states require proof of a search for employment. Some states will just impute minimum wage.
Your best bet is to meet with a family law attorney if you want accurate and/or specific answers.