Hi english_catalan
I like your screenname

Congratulations on the upcoming baby!

I have never met anyone else who suffered the same kind of childhood.
Good thing you came here then, lot's of people with BPD parents here! Being the child of a BPD parent can be quite challenging and you also mention suspecting your father is somewhere on the autism spectrum which adds another layer of complexity. I am glad you are reaching out for support here and hope you participating here will make you feel less alone.
You say your mother has flipped again, what is she doing exactly? What would you generally describe as her most difficult or unpleasant behaviors?
And I am afraid of having a child because of my experiences. I know that I don't have BPD, but I also know that I reproduce some patterns of hers and that I have a terrible temper and little emotional control partly because of my childhood. My saviour was my grandmother, my mother's mother, who was a wonderful support to me. She died 6 years ago and I miss her terribly, especially now, being pregnant and far from female friends from my childhood, far from my culture, yet not able to get much comfort from my mother.
I am glad you had such a supportive grandmother, it really helps having a loving and supportive adult there during your childhood to help you deal with all the things that are going on. I can understand how tough this must be for you not having your grandmother with you anymore, particularly at times like these.
Many children of BPD parents find themselves struggling in their adult lives with learned unhealthy BPD behaviors that they copied from their BPD parents. Fortunately these learned behaviors can also be unlearned or at least better managed through hard work. It's good that you are able to recognize and acknowledge these things about yourself. That's already the first step to being able to make a change

We have a thread here in which we explored our own possibly unhealthy behaviors and less than constructive coping mechanisms. I think you might find it insightful too:
Recognizing and dealing with our own unhealthy behaviors and coping mechanismsWelcome to bpdfamily