I am also on the "Highly Likely", and currently on the waitlist for a clinic. The best thing I did was being open and honest with my partner, as my ADD behaviors would sometimes exasperate her. I did the same with my manager at work, and it can usually get you some degree of accommodation which can help you cope.
I suffer for the 3-for-1 Triple A special: Autism, Anxiety and ADD. Seems to be a fairly common combination. Physical exercise helps greatly with anxiety, and helps to some degree to ADD as it does generate a certain sense of "reward" in my brain.