{{{hugs}}} I'm so sorry that you're so overwhelmed by everything, and there is a lot to be overwhelmed about!
Have you considered OA - Overeaters Anonymous? It is based on the same 12-step program and I think it's worth a look see. since you've done well with AA, I think between AA and OA, you'd really be getting the round the clock support you need in both areas using the same core principals.
My sister in law has been in OA for about 5 years. Not only did she lose a lot of weight, but she is a stronger person today. She has 4 kids who have really put her through the ringer and through it all she's leaned on her sponsors and friends she met in OA. Her husband, my brother, is an AA alumni for 25 years!
Take it one step at a time. I agree that having a hysterectomy in the midst of all these other emotions may be too much to handle. However, if having the hysterectomy will resolve at least the two issues of mentrual bleeding/pain and having to take a medication that doesn't agree with you - maybe it's a good idea.
Is there any chance you could get a 2nd opinion in regards to the hysterectomy? And perhaps see a different psychiatrist - one who actually listens to your pain and offers some viable solutions?
Each day try and meet one goal, one at a time. And try to write down one good thing about yourself each day and focus on that. You are a good cook, you love your daughter with your whole heart. You are a good listener...etc. I'm sorry that your difficult child says such cruel things to you, it's not okay. She is young and hopefully when she sees you helping yourself she will back off and find something nice to say instead.
Sending many gentle hugs. I really think you should look into OA!!