Incidentally, my PIL were recently hacked. Every single computer and similar device in their home - anything which can connect to the Internet. Everything was locked and/or stolen, including pictures.
These are pictures which were not online, just stored on the hard drive. They are online now though.
My point being that: if someone wants to get something, they will get it. It doesn't have to be on facebook.
Your choice to not post photos is justified. Your reasoning, not so much.
And since you aren't yet pregnant (how do people know btw since OP hasn't been back?), I think you are overthinking these issues slightly, and I'm wondering if perhaps it's a cover for deeper worries you have?
If a new mum allows herself the time, there will be time for tea and mn. Again, the best advice I can give is: enjoy your baby, the time flies. Use whatever help you are given, don't be a martyr. And drop those standards if you have to!