Good -- I'm glad you're going to tell your therapist new things. There are undoubtedly many things from your childhood that effected your adult life and are effecting you now!
It's difficult being an "oops" baby -- a "mistake" baby. I was one too. Why do parents TELL their children that? Why don't they know that their kids are going to feel unwanted after that?
What makes you think that your mother is turning your daughter against you? Is it because your daughter isn't coming home? That could be for a number of reasons, like not wanting to change schools, not wanting to leave friends, etc. It is probably NOT because your Mom is turning her against you, sweetie. Why would your mother do that? She doesn't HATE you!!! I'm SURE your mother loves you!

Even tho you and your Mom haven't been able to get along, you are STILL her daughter -- and you yourself know that parents CAN'T just stop loving their children.
I hope you have a good session today. Keep us updated on your progress, okay? God bless and hope to hear more soon. Hugs, Lee