Congratulations on your pregnancy
we're after baby number three as well (I may be biased coming from a family of three kids, but to me it's the best number
).
I totally understand you wanting your husband to share in your joy and feeling annoyed at his worries and stress, but as someone who also had a surprise pregnancy with my son and also had a husband who was less than thrilled about it, I would advise you to be patient with him. When we first found out we were expecting our son it was the worst time possible for us: we were a few weeks away from going on a two-year-emigration to NZ (our life long dream) and had leased out our flat to tenants. It came as a bombshell and both of us were desperately unhappy. When it got to 12 weeks though and I saw our little man waving at us and wiggling all over the place my worries and unhappiness vanished literally that second and instead this powerful love remained. My husband though, was very unhappy for the remainder of the pregnancy and he didn't really get involved at all. When our son was born, it took him a few months, but he finally found his feet as a father and now is an amazing attentive dad who looks after our kids while I'm at work three days a week. Even though it hurt me deeply, I didn't push him to enjoy the pregnancy with me and I listened when he voices his anger and concerns. I didn't ask him to be happy with me or even hint at it, as really, I totally understood where he was coming from. I'd been there too until the 12 week scan. I would suggest giving him time to come to terms with it - an unplanned baby is a
huge life upheaval, especially if he was certain he didn't want any more children. To him this might be a truly crushing thing to happen and it may take a really long time for him to feel at peace with it. In the meantime this is of course going to be hard for you, as I imagine you'll want to share the highs with him. Is there someone else you could do that with till he's ready? A close friend, sibling parent etc.?
I do feel sorry for men in these situations and also for the mums who then haven't got a supportive partner during their pregnancy.
I hope he comes around soon!