Poet, the threat to break a window sounds kinda scary. I wouldn't want to advise you to don the mantle of victimhood, but why do you not change the locks anyway.
It's just a matter of your own safety and sanity.
I don't quite get what happened with the truck but it sounds like ya'll are getting tripped up on boundary/respect problems. Making the boundaries explicit might help. Like, come to some agreement that he cannot come to the house any more. And you cannot go to his trailer.
I never threatened anything, certainly not "I'll break a window" and yet my wife has a protection order on me.
I'm sorry about the OW thoughts that haunt you, but you can't go asking him that anymore. Stay away from that topic. And don't ask for hugs either - pressure pressure. You've got to be strong, honey, stronger than you are now. you can do it.