Another baby

So my LO is 12 weeks and I have a 9 year old step son (who I've basically raised as my own since he was 2 because his birth mom is MIA) anyways I want another baby so bad and after having discussed it with my husband I don't think it's ever going to happen. I know there is still hormonal things going on but I'm seriously so upset and am having negative feelings toward my husband because of it. I know it's his decision too and I'm trying hard not too be selfish but the thought of never being able to do this again is killing me. 😢