Momma of a FTM here. I am so sorry this is happening to you. I am still guilty of sometimes using the wrong pronoun. Although he has been out to us for almost a year, he is only a few months out to the rest of the family and didn't want us to change pronouns until then.
As for the rest of our family, most of them are on board. One seems to be ignoring it, and just skips pronouns all together. Not being mean, or ignoring him. Just taking some time to wrap her head around it I think.
Hopefully, given time, your family will come around to. I hope it doesn't take 10 years. Someday when I wake up rich, I am going to start a nationwide chain of Gender Centers so that there is always a safe place for people going through this. But until then I am just going to hang out here and try to be a friend.
Majik