You have a complicated situation. This is really a hard question to answer on line. I think this is why four days have passed and no one has answered this for you. If you have completed rehab and you are clean that is good.
You need to do something soon to protect your rights. You should consult with a local attorney who concentrates in custody and Family Law matters. They will be able to better assess your situation and give you the advice you need to protect your rights as a parent. Good luck to you.
Attorney at Law
Valatie, New York
The information offered at this website is not, nor is it intended to be, legal advice. You should consult an attorney for legal advice regarding your individual situation. This answer does not create an attorney-client relationship.
It sounds like you have the basis for an application for a change of custody. The sooner you make the application the better. As for a better idea of what will happen speak to an attorney.
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This advice is not meant to create an attorney-client relationship and is a general anwer to the question posed.