I want a second baby, but can we afford it?!

So my princess just turned 8 months. My husband has been pushing for a second baby, but he understands I’d really like to lose the weight of the first one and get into good shape so I can be pregnant and keep up with a toddler-whom we think is going to be a super active child! So I’m a stay at home mom for about 4 months now and LOVE it, but I always worry about money and I have always been that way. Our insurance is good for preventative care, but has a huge deductible for maternity care. Looking for input on what others do and how you do it