I'm really sorry to read all that.
The first thing I can recommend is stop drinking - it helps noone and nothing.
I understand the pain can seem immense sometimes but you need to be strong for yourself, your grandbabies and your daughter. Yu never know when you might be called on to help.
The second thing I would do is speak to your daughter and share your concerns.
Lastly, if you feel your grandbabies are in any danger or ill cared for, there must be a range of options for you to do a welfare check, or even sue for custody if things got that bad.
I'm not in the US tho, so I'm not sure.
That would be absolute last resort - I would definitely try expressing your concerns to your daughter first tho.you can look for help .
One more piece of advice - don't lose yourself in all of this - it's clear you love your family, but leave a little love aside for you too.
Drinking is doing you no favours - you deserve better.
We can help with support