(((((((WTBH)))))) It sounds like you triggered in a PTSD kind of way, friend. Totally understandable, but yeah, I'm sure it gave him exactly the reaction he wanted. You, flustered & scared. I'll bet it made him feel pretty powerful. Jerk.
Nothing is going to make him stop until he's ready, IMO. He's going to keep dragging you through this system as long as the system allows him to file this crap & unfortunately, the only thing you CAN do is stay patient & try not to let him see when your feathers have been ruffled. I know that sucks & it's completely unfair, but that IS where you're at with him right now.
Others have such great advice in dealing with these situations, I hope something resonates for you. ((((More Hugs))))