"How many exemptions do I claim on my W-4 if I have two children and a husband on unemployment?"?

I recently started a new job and I'm confused about my w-4. My husband has been on unemployment and, unless a job opportunity comes along, will be until this summer so are we considered to have two incomes? Also, we have two children and I'm not sure how many total exemptions I should write down. Any help would be wonderful! Thank you!