attila's post was very very good and helpful (as were the others) the information for support and help was great.
If you had not just had your baby would you still be feeling this way?
From my point of view it seems to me that giving birth, as it does with all of us, can make a mother feel emotionally vulnerable. The baby's arrival brings such joy and love that we want to share it with the world, we want others to join in with this wonderful experience and of course most of us want our family around us.
It must be a very sharp reminder of everything that you have lost lavender the family that are no longer by your side, but this doesn't mean they should be welcomed back, it simply means you acknowledge that this is a period of time when you are likely to be feeling much more strongly than usual, and to accept those feelings.
I too am estranged from my parents and brother, it is a bereavement but it does get better. I love my family very much, and it has been the hardest thing having no contact at times, but I have quietly accepted the pain in exchange for the opportunity to raise my children away from their toxic dynamic and influence.
I find christmases and birthdays very hard, I would find having a baby even harder. But I know they will not change, apologise or alter themselves in any way to make things better, so there is nothing I can do, I can only change my actions, I can't change theirs.
There are many options available to you, you could send a new baby card and keep in contact by post only. That way you could also inform your brother. You run the risk that they ignore it, which will compound your pain, but may provide closure also in doing so.
You could choose to see her once a year (or more) if she responds to the card, however by doing so you will have to accept that you are most likely setting yourself up to be hurt again, she is unlikely to change if she hasn't even apologised or made any kind of effort to contact you.
I wish my dc had gp that loved them and were there for them, but the way I see it as it least they have devoted educated parents, that will walk to the end of the world for them. They don't need gp that will hurt and judge them, they need solid parents day in and day out that teaches them resilience and independence and self respect.
I would give it a little longer and see if you are feelings are being influenced by your new baby, or whether you genuinely want to see her/them again. If the baby had not arrived would you contact them?
Dysfunctional families are so difficult to navigate you have my sympathy, but focusing on the people that do love you and are around for you in every way is the way forward.
Sending your estranged family love and best wishes with your thoughts, but choosing not to actively engage with them may be the half way house you need. I often send my parents love by thought or prayer, I don't allow anger or negativity about my childhood damage me further, that was then, this is now. So I forgive them for hurting me, but I also give myself permission to be happy, to be free from judgement and emotional pain and to be respected, and I feel none of those things when I am with them.
In the end it is your choice. What do you think you will do?