That is very hurtful.
To answer your question: i dont know because i never had children so i never had to deal with that discomfort and hormonal hell.
Frankly, there is a huge chance that i would be overwhelmed and possibly drowning in hormones, so I probably would have forgotten about letting people know. Besides, hormones can temporarily alter someone’s behavior, so.....
May be what happened was unintentional. There may have been some sort of a drama that made them forget about notifying closed ones.
Honestly, yes, if I were you, I would be very hurt but... it may not be the right time to bring it up.