Telling family members??

I need some serious help! I have family who has always randomly texted or made comments to me that I don't need any more babies or I better not be pregnant or to be is super first pregnancy I was young (21) and the father walked out so I did everything by myself (my mother passed away right before and we were best friends) so I essentially did everything alone never asked for anyone's help and my son is the most amazing kid ever. Me and my boyfriend are pregnant with number two due in October and he told all his family
Immediately from excitement since this is his first...I have yet to tell most of my friends and family (I'm 26 and always wanted more babies) how do I break the news to family whose always saying negative things?