What are some good grief groups in Portland?

My 31 year old son died from an overdose Friday. He had so much going for him, he just made a fatal error in judgement. I am looking for grief groups for parents of adult children or overdose victims hopefully on the Westside. And eff fentanyl. People who sell that are as much to blame for the deaths as the people that buy it. People, use test strips. Nothing is certain.