OP - I get it. My mom is like this too.
No matter what you do it's not good enough. She reemed me the day I got home with the baby because she hadn't seen pictures yet. She reemed me for my uncle getting his Christmas card first - but he got just a card and she was getting a package. There is also the guilt at visiting her. I totally see my mother in your post.
Being away from her helps so much. I've learned she doesn't matter in my day to day life and it doesn't get to me asmuch anymore. I know she is happiest when she isn't happy, so I go with it. Yes mother dear. Feel better now. Good.
Hopefully you will be able to brush it off and go back to being happy about your pregnancy. Congrats!
I agree! Clearly, we are in the minority, since so many seem to be focused on the fact that that OP notified the assorted parents via email and don't seem to grasp the significance of the
rest of the post.
I, for one, would never have announced a pregnancy to the parents via email, but there are plenty of folks who find that sort of thing perfectly acceptable. The OP indicated that her past two pregnancies were also announced via email and her mother was fine with that method for #2 and #3. So she used the same method for #4. It's not the OP's fault her mother let her email account go by the wayside. Sounds like Mama has some communication issues herself. Believe me, from the rants she's laid out, if Mama had any venting to do about being notified via email regarding the past two pregnancies, my money says there's no way on God's green earth she would have kept her mouth shut about it all these years.

What??? Miss an opportunity to let her DD know yet ANOTHER way in which she has fallen short as a daughter? You've got to be kidding.

This is not a woman who keeps her gripes to herself, as far as I can tell. No, she vents freely and publicly.
If you have not had experience with this sort of mother (or in my case, MIL) then thank your lucky stars, my friends. As the poster above said, NOTHING is ever good enough for them. If the OP
had phoned all the parents to tell them the pregnancy news, Mama would have gritched unless she was the very FIRST one to be told. Even then, the OP might have heard, "Well, I don't know when I'll ever get to see this new baby since you never come to see me." With parents like these, you get tired of knocking yourself out, only to fall short of their impossible standards. You can't MEET the standards, because they are amorphous.....That way, Mama can move the yardstick at the last minute and you'll still fail to meet her expectation and demands, because she changed the goal as the clock ran out.
Why do they do this? My theory, after knowing MIL for decades, was that she was a fundamentally unhappy person who simply
could not be made happy, no matter what. She wanted to be happy, but since she could not do it for herself, she looked to her children to make her happy. But since she was
INCAPABLE of being happy, it was
IMPOSSIBLE for them to make her happy. So no matter what they did for her, they were doomed to disappoint her every time, because they "failed" to make her happy.
When I read the OP's post, it was plain as day to me. You learn to recognize these people once you've had one in your life. Even if the OP had not committed these "transgressions," her mother would simply find/ make up more to hold against her. It is common for people like this to be narcissistic and paint themselves as the victim. Maybe that's the case with the OP's mother. I know my MIL was very childlike and you cannot reason with a childlike person. I told my DH years ago to accept that he would never satisfy his mother, no matter what he did, so he needed to DROP that goal.
So let it roll off your back and enjoy the pregnancy.