I'm so upset

I had 2 teenagers kids and thought me and the hubby were done but god decided to send me my miracle baby. She just turned 4 months and I couldn't be happier with her. I was on birth control when I got pregnant with her so it was a total shock, my pregnancy was high risk from beginning to end and I even had to quit my job. Since my hubby saw how rough it all was he decided that he was going to get a vasectomy since other types of birth control had not worked but now that the baby is born he keeps putting it off and saying he doesn't think he wants to do it. I think it's so unfair that we woman have to go through everything including having to take care of the birth control. If I knew that we could by any chance afford another baby I wouldn't mind him changing his mind but I know that we can't. I am extremely upset and don't even know what to think anymore.