Legal relapse

I been clean from cocaine for 11yrs. I changed my career path and became a therapist for substance abuse. I some how ended up trying 7-OH which is like an opiate. You can buy them at gas stations and smoke shops. They get you really high and relaxed and lay there like you are taking a Percocet. I found myself addicted and I’m scared to stop because of withdrawal. The fact that these things are legal blows my mind. I want to stop but I’m struggling. I’m scared of withdrawal, I love the relaxed feeling, I hate that they make me lazy, and I hate how expensive they are and financially hurting me. I just wish I had a friend I could talk to about it. Just need that friend support but I have no one.