That's a lot going on.
And it sounds like you are doing a LOT better. You are using the tools, and they are working.
Now with my new job shaping up and logistics planning ablut he dropping D6 in the morning and me picking in the evening, he tends to get dysregulated when I start bringing up the topic. I think due to my anxiety, I like to have a firm plan and leave very little room for uncertainty and my job won't let me any flexibility at all but he feels pressured coz this is CHANGE.
Some pwBPD would pretty actively try to undermine you getting a new job, and do it by throwing a monkey wrench into things... .like waiting 'till you are at work, then telling you he can't drop D6 off, making you leave work to manage it, and sabotaging your job.
I don't know your story well enough to know if your H is likely to pull that kind of thing or not.
If not, he's still likely to dysregulate just over the stress and change going on... .so expect something.
So I quickly reached out to my friends and neighbors for the very little help I needed in terms of driving my D6 to school one day
Warn some of these supporters that you may need a bit more help, perhaps on short notice. Have backup options ready.
Knowing that the dysregulation won't have wider consequences should ease your mind.
When your work schedule becomes the new normal, things should settle down.