There is absolutely no way to know. I also suspect that this was a very traumatic experience for you and is causing flashbacks. The whole definition of flashbacks was originally coined to describe flashing back to traumatic experiences, period, not just drug experiences.
So, the good news, and not the minimizing of it, is that "it's all in your head". Well, not all of it maybe, but a lot of it might be psychological at this point. Again, I'm not minimizing "psychological". People in Haiti have hexes put on them and they go off and die. It's psychological, but they're still dead. Psychological is powerful and real. However, it also means that if you work hard, with your therapist and without, you have the tools to come back from it to a huge degree.