I want to try dog

I’ve lived on substances since I was 12 and I’m 17 in less than a month. I could live without them but I have this need. They don’t stop my thoughts they just make life more fun. They add to the sadness but also make it more bearable. What do I do. I use ket everyday and use mdma weekly, aswell as being stoned 24/7 (I dabble in Xanax and vallium too) I want to try Benadryl, can anyone give me advice before trying it.