Reaction to pregnancy

I am new to group. My husband is autistic, only recently diagnosed. I am currently 21 weeks pregnant with our 2nd child. Yet my husband barely acknowledges pregnancy and has refused to tell his family I am pregnant. I am struggling with his attitude towards me as am made to feel I am being unreasonable. I am hoping to get some advise on how I can persuade my husband to tell people without causing an argument. 

Am I being hormonal and unreasonable? 

Thanks in advance