It’s encouraging that you are posting looking for advice and support, not for someone to sign off that it’s okay to substitute one drug for another.
You’re a rehab pro now, so unless you weren’t paying attention, there probably isn’t much more information for you to absorb. You are asking an age old fundamental question - what does it take to commit to sobriety? It is possible to act your way into improved thinking, rather than think yourself into better actions, so take actions that build that sobriety. Like no substances or booze in the house, none at all by anyone even guests, for maybe 90 or 180 days. And it is most certainly okay to impose on the convenience or habits of others living with you - you need to do this for your health and sanity. If they will not support your actions, then find other ways to deal with the presence of drugs and booze - like maybe leaving the situation if required.
Do what you think is best regarding your sobriety date - you may consider restarting that as of today.
A couple of helpful discussions can be found here.