Retroactive jealousy

Me & my partner have been together for 2 years and she suffers with extreme quiet BPD (as well as autism and many other things). The first year was hard but I feel we keep growing and learning more on how to deal with things, except one thing. We’re certain she suffers with retroactive jealousy, and what doesn’t help this is the flood of unnecessary stories I told her at the start of our relationship about my past. But still two years later, it’s an issue almost every day, if not at least every week. From unnoticeable triggers to me just blurting out things without thinking first, there’s always something. She hates it, I hate it. What’s worse is that she goes mute when she’s upset, so we’ll barely speak for however long it effects her for, this instance it rolled over two days, just because we both partook in a light conversation about our pasts, which inevitably triggered her but only now after two days do I know this. She’s completed 6 months of DBT therapy which has helped a little but not a lot. I was wondering if anyone else experiences similar situations with their BPD partner? I feel really alone when having to go through this. I don’t know how to handle it