ADD husband "needs time" to get used to it before he does anything about it...

My husband has (yet) undiagnosed ADD.  It's been 4 weeks since I handed him a list of symptoms and asked him what he thought...  This past year has been awful.  I believe that his ADD was masked as laziness until then but the changes and difficulties we've faced in this year and especially him being without regular work have really brought it out.  If we didn't have children (a toddler and one on the way) I would have probably left already.  When I started researching ADD I was actually quite excited.  I had tried all sorts of things to improve our marriage but nothing seemed to work and I felt very alone.  In my mind, if this is what it is, then at least there's hope for change. 

I thought he saw it the same way (he agrees that it's likely he has it) but 4 weeks later he hasn't done anything...  He has an appointment to see a Dr. in 3 weeks for diagnosis.  He's tried emailing a few coaches but when they don't reply he doesn't follow through.  I've been spending all my spare time reading about ADD and how it affects marriage but he doesn't seem that interested.  He told me this morning that I need to stop pushing - that he needs more time to adjust to it and work though what this means for him.  Is this normal???  How long am I going to have to wait???  I thought he would be excited to have an idea of what's "wrong" and want to work at making it better.  Did anyone else go through a long period of their ADD spouse not being ready to take any action steps?  Did anyone else with ADD need a while to get used to the idea?  How long do I wait before I do something?