L,
I experimented with different drugs as well when I was younger. It was over a period of several years. I was seeing a shrink for OCD issues and he told me that he believed my prior drug abuse contributed greatly to my OCD. So obviously there is some sort of connection that they know about. However, let me just say that I have had OCD as long as I remember being alive, so I'm not sure how right he was about my particular case.