Who to see if you think you have more than one diagnosis?

Greetings,

What type of talk therapist should you seek out if you are unsure of your issues? Like, is it depression, anxiety, ocd, adhd etc? Currently have certified PTSD via World Trade Center Health Program (survivor) though I never sought additional help from them. They took 3-4 years for my psych eval and another year to tell me yes, you have PTSD.

Any advice is much appreciated.