At the end of my rope

I'm married to someone who I believe has ADHD....I only figured this out about a month ago (long story) and trying to get him to see there is a problem is so frustrating.  After several failed businesses, tons of money lost/squandered, lots of distractions and a marriage on the rocks, I just don't know what to do.  Whenever I try to raise the issue, he blows up, yells and screams and swears and then says I'm not supportive; I just don't understand him; I'm negative; that he's trying really hard and that nothing pleases me.  I can't take it anymore and I've tried everything.  It is like walking on egg shells in my house and I don't think it is OK to yell at me in front of the kids and swear. I'm so sad and I am scared too.  I don't want this marriage to end but I don't know where to go or what to do. Any help, please pass it along.