Husband now decided he want's another baby, but he is on the hospital waiting list for a vasectomy????

We already have 2 boys, aged 6 and 20 months. My husband agreed that he did not want any more children. We only have a 2 bedroom house and any more kids and we would have to move, especially if we had a girl. He is on the waiting list at the hospital for a vasectomy, and I am on the depot injection. I was not happy at him having the 'snip' as the decision should be made by both of us in my opinion. He was adamant he did not want anymore so went on the waiting list. He has now decided he is getting broody and would like 1 more child. After his drastic decision a few months ago, he now thinks I should agree with him to have another baby. I would of liked another child soon after my last son was born as I am 34 in March and it took me 2 years to get pregnant with last son after stopping having the depo injection. This means if I stop it again, I could be 36 before getting pregnant again and I think this is too old. Am I now the spiteful one for not wanting anymore now.