Opinions? Did I over react?

So I’m 9 weeks pregnant with my first baby and yesterday I was so (extra excited) over my ultrasound and the dr saying everything was great. Well I decided I was ready to announce to my entire family and when I told my husband this he acted off about it like he didn’t want me to. He has a 17 year old son with another woman already and him and my family talk often so my husband told me my family might blab and he didn’t want his son finding out. When I asked why he said he wants to be able to tell him and have a discussion with him? I kinda understood but sort of pissed me off...a discussion? He’s 17 about to be 18... not 9. His mom has remarried and divorced at least 5 times in the past 2 years and had 3 more kids by 2 other men and I have to pause my pregnancy announcement longer because he needs to have a discussion with his son...like why haven’t you picked up the phone and told him then? my husband said his son has always been the only child for him his #1 and they needed to have a talk.... it kind of rubs off like my husband is ashamed of this pregnancy? Maybe I’m over reacting but it pissed me off.

It’s been hard journey to get where I am. 5 year of trying for my first baby and tbh he hasn’t acted too excited since I found out I was expecting. Oh well. I made my announcement anyways.