Hi, and welcome!

The dieting/exercise/weight loss parts seem like part of something else, not bipolar. And "Acting like teenager again (reverting back to youth?)" sounds very mid-life crisis-like. Which of course doesn't happen at the same age for everyone (or happen at all necessarily), and you don't mention age, but mathematically, with 21 years of marriage, it's well within the realm of possibility.

Of course, there's no real way for me to know if he's got BP or not, but the "stimulant induced mania" part bothers me. It is specifically noted (in pdocs diagnostic manuals themselves), that symptoms caused by a substance are NOT to be counted toward fulfilling diagnostic criteria. So… guess I'm saying I hoping the pdoc was careful to look into "the whole picture", as they say. (He probably did, it's just that professionals should be careful on the substance issue, I don't always think they are and it bothers me.) The family history can be a very common thing. Bottom line is that it's the sum total of the quantity of diagnostic criteria met and the level of their negative impact on one's life are what diagnoses are all about.

I've got BP II, so, though I get strong hypomania, I've never had full-blown mania. Which is to say there are things that lay beyond the realm of my experience. That said...I can't say that I didn't know what I was doing (though I probably don't have an accurate picture of how it comes off to others, or the magnitude of it, I'm not completely oblivious of the actions themselves). My memory is not so sharp and I do have things people say happened that have no memory of, but they are pretty minor things. It's not like I lose giant chunks of memory, but I DO (nearly always) think later, "what the hell was I thinking??!!". In times of being in an episode being "very out of character". OH YES.

Most of all, to you. It cannot be easy and my heart goes out to you. Be sure to care for yourself.