I am going to be the voice of disagreement here

if your husband is drinking and doing drugs
I don't think a time line is a horrendous thing

maybe giving yourself the timelinei nstead of laying it out there might have been good but it is out there already

so

you have six months to work on yourself
to find out what about you stays with an abussive drug user and why
to find out what kind of example you are willing to set for your children

when there is abuse, drug use etc, a timeline isn't controlling or bad
a timeline is safety
a timeline is a touchstone

I had a timeline when i was in an abussive relationship
it was my timeline to safety, when my boys and I would get out

no one's abuse is your fault
that is there dealio
no one's drug usage is your fault

you have these 6 months now to work on yourself

if you decide to ammend the timeline at that point...you can
son't worry about it now