You sound like you have a pretty good handle on your sitch already. That is good. Don't be surprised though that at a drop of a hat it will seem like you're losing grip on your world.
That's what we're here for, to support each other in the tough times and rejoice with you at the small baby steps.
Like the others have said, nobody knows what this is like unless they've traveled the path.
Your H sounds like he's definitely out there spinning and one of the goals here for some of us with hope of saving our M is to outlast the spouse's MLC. It is not a sprint but a marathon! More importantly, this is about saving yourself.
The journey you will take if that what you decide to do is not an easy one, but in the end you will consider it a blessing for all that you're able to learn about yourself.