I've been in a similar situation. A healthcare executive i did some personal consulting leaked a fairly generous amount of information on me after i cut him and his son off. I've been followed by ex-police and have had more than a few specific events trigger some paranoia/fear but after several uneventful run-ins I saw it for what it was. Intimidation without teeth. It's a two party problem. Both want to protect their own interests more than they want to cause me harm. One of the thing that kept me motivated was the knowledge that the continued secrecy around the tools being employed on me as being more valuable/important than any contract/hit placed on me. My appearance of coolness or calmness in day-to-day life threatens the man that tried to undo me and there is nothing more he can do without further risking his situation. He knows less than the people he set on me and nothing of what I have collected on him/them since. Learn to find joy/peace antagonizing your real or imagined enemies.