I'm sorry you are hurting so badly.
Your past is way in the past and you have changed. If your daughters are intelligent, they know this and, since they are now mothers, know how hard it was for you. The way they choose to deal with it, unfortunately, is out of your control.
If your younger daughter is now in counseling or going to Al-Anon her distance from you may be due to realizing (in her mind) that you two are too enmeshed. Many adult children like their space and don't want to talk to Mom every day or hang out with her. I think that's normal. Not to mention, she is going through a lot with her husband and has her own life. But there is a solution that many of us have come to embrace.
Although our adult children CAN be a source of joy and light in our lives, they aren't always and, even if we get along well, they do go on without us, if they are healthy. The best thing I personally can recommend is to maybe go to a Twelve Step Group, even though you personally are not involved with drugs anymore...maybe go to Al-Anon because your relationship with your daughter is different now because of her husband. It fits, in my opinion. You probably won't have to wait long to find a meeting, not two weeks. There should be one tonight. I gained a lot from Al-Anon, even stuff that has NOTHING to do with loving somebody with drug addiction. It helps everything in life, in my opinion. The philosophy in my opinion is very solid and would help anyone. It's lots of common sense. You don't even need a higher power for it to work.
If you don't like that idea, I highly recommend private counseling/therapy to teach you how to move forward with your own life, even though your daughter seems to be pulling away from you. Her life is hers and she is 100% responsible for what she does. You have 0% control over her. But you have 100% over your own life and you can make it a good, full life, embracing your husband and your friends and non-toxic loved ones as well as your hobbies, your job (if you work), and anything else you love to do. Our kids are not obligated to keep us company nor share their children with us, although we hope they do. We can't force it. It is best to love ourselves and enjoy all the blessings we get, but not expect anyone from outside of us to make us happy. They can't. Only we can.
I like these two opinions of the past.
"The past doesn't exist." (It's true. It is gone)
"The past is gone. Learn from it.
The future is coming. Prepare for it.
The present is NOW. LIVE IT!"
If you are still in touch with your family, who has been so abusive to you, you may need to pull back yourself, go low contact, or even no contact, if they cause you pain. Nobody has the right to abuse you. Not Dad. Not Mom. Not Sis. Not Aunt Patricia.
Not Kissing Cousin Lucy. Not next door neighbor Mr. and Mrs. Nosy. It is not necessary to carry on relationships with anyone for any reason if they abuse you. I've had to let go of my family of origin. My life got much better after that. Now you didn't say they are still abusing you. It's just that this "you-are-the-black-sheep" pattern usually persists unless we stop it. Sometimes talking to them works. Often it doesn't and we have to decide if we want to listen to abuse anymore.
Unfortunately, our grown children can abuse us too and then we have to make very hard choices. I have one son we adopted at six that walked out of our lives. The one time I've seen him in eight years, he was so vile and abusive, I decided "this is over. No more groveling." I've felt much better ever since.
By the way, you are not responsible for your daughters choice of husbands. Many daughters of drug users decide that they would NEVER get involved with anyone who used drugs. They learn from their past. Your daughters did not, but it's not your fault. Dwelling on the past, blaming ourselves for our ADULT children's eyes-wide-open choices does nobody any good, especially us and it does not help our grown children.
Others will come along. I hope you keep us posted. We're a goodhearted group.