A.K.
A.,
Is there a counselor that you can talk to? This problem goes beyond an advice forum. You need to be educated about the type of family you have and what you can do to protect yourself emotionally from them.
I know that it is painful to have an unsupportive and even damaging family. The fact that they called you a "B" growing up is a big red flag.
Please get help from a good therapist so that you can move forward and give your best to your sweet husband and daughters. If you don't this will haunt you your whole life and your new loving family WILL suffer.
Hugs to you,
A.