Hello. I had a tbi on 9/13 while riding my horse. we were assaulted by motorcyclists which perused us until I fell off. Now when riding horseback, if there is a sudden or unexpected fast movement, I go blank for a few seconds and "wake up" when its all over-usually a few seconds. I cannot support my horse or myself when this ac cures. this never happened before, but it has happened 3 times now, which makes me feel I need to do something. any suggestions on how to get rid of these- i guess- flashbacks or "blank" moments?