ADHD therapist?

How do you find a therapist who is experienced in ADHD couples? I secretively asked my husband's doctor for one for me to see to try to learn to cope with his ADHD and stay married. After waiitng months to get in her schedule, I' ve had several visits where I always leave feeling like I've wasted my time and money. Not one bit of advice on how to cope other than seeming to support divorcing him or "assertiveness training" for me which has thus far involved my writing down when I feel I wasn't assertive.

I need help on this rollercoaster.