Consequential damage caused by cannabis?

Hello

The following happened: Exactly one year ago I smoked cannabis and injured myself. The injury led to a panic attack because of someone else and I lost consciousness for a short moment. When I came to, I was more or less fine again, but I still have that feeling from the injury and have become extremely cautious about putting strain on my body in that area. What can I do and who can I seek help from? Who specializes in this kind of thing?