Naturopaths, HELP, I can't turn my brain off, please read :q?

I have been on anti depressants for many years because I couldn't turn my brain off, but I don't need them anymore. I am no working full time, my kids are grown and gone and essentially my stress level is nill. But I get into emotional trauma and huge abandonment issues and my brain just won't let my body sleep. I don't know what supplements to take as when I was on anti-depressants, I couldn't take anything natural with them, I really don't think I am depressed, but my family has been very mean to me and when they upset me, I seem to go into this " I can't sleep stage". What do you suggest I take, It used to be L-Tryptophan, but we can't buy that ?? what do I take, I do NOT want to go back on the anti depressants. When I walk and walk and walk, it calms me down, but right now, NOTHING can make my brain shut off so I can sleep. suggestions ?