To work or not...

So I am pregnant with number 3 and I have been a working mom with my other two. It has always been hard but I work for an amazing childcare facility and I get a great discount and take my kids with me. But with my third the discount goes down and infants are very expensive and honestly I want to be home with my children. Has anyone gone from two incomes to one and how difficult it was? Trying to help my husband see how it is possible for us. Thank you!