Is he not happy? Please help..

I've been with my SO for 10 years now we have a 6 year old daughter and I am now pregnant with my second baby when I told him he was happy crying happy tears even. 
I'm happy so I always bring up the baby and make remarks like "babe the baby and I are hungry" "I'm eating for 2 now" 
I say these things a lot I'm sure it's cause I'm happy but today when I said "the baby and I are hungry" (trying to be cute about it) he flipped out on me..he said "Stop doing that! Ok I get U are prego but why do u keep doing or saying that? It gets annoying. Like it's obvious U are doing it on purpose" 
I'm so confused now...what do you ladies think I should say or do?? 
I can't stop crying..