Welcome, StillGrowing!

That's interesting that you're crediting divine intervention for ending up here... .I have a similar situation where nearly 4 years ago I noticed that my uBPDw and I seemed to have drastically different recollections of the same events and seemingly different realities (coupled with lots of emotional issues on her end). So I prayed that I would be able to see things as they actually are and very soon after stumbled upon BPD, which explained everything.
To briefly give some advice:
1) Don't tell your husband you think he has BPD;
2) You didn't cause it and you can't cure it;
3) Work on improving your self-care;
4) Learn about and practice validation and boundaries.