LOL KingsFish you're such a sweetheart. I had to admit that I was chewing my lip a little bit when I woke up and read all the responses, lol. At least we all have our love and concern for our bettas in common no matter what, no? :)
And perhaps you might have saved my little Draco! The last post I read last night was your previous one, and I didn't respond yet because I was so tired but I DID follow your advice exactly. When I woke up and checked on him he was no longer on his side and (I think) his fins have opened up a bit more. I'm going to follow your advice further and leave him there for a couple of more hours before I move him back to his tank, and then eventually another epsom bath.
So far I'm pretty hopeful, and words can't accurately express how grateful I am to all of you... especially to you KingsFish! I wish I could hug you in person, lol.