I know this hurts, and am so sorry you're going through this.
Your H is angry right now at not getting his way. He is irrational and has no concept that what you did had to be done to protect yourself. Canceling your truck ins. is his way of throwing a tantrum. It also may be his way of trying to get you to contact him to try and get you to bargain with him.
Did you find out from your L if this is something your H can just do? I don't know what the laws are in your state, but I would think that with a divorce pending it would have to be negotiated?
Stay dark. Call your L to find out if there is anything else H could just cancel or do. Their sense of entitlement can be used to justify most anything.