Fertility specialist?

Stacy • My name is Stacy, i love anime and lolita fashion.
Ok so you have to referred to a specialist or can you just go? If you have to be referred, how long must you to ttc before getting referred? I asked cause I've been to obgyn and I've told them I've been TTC for 5 years but all I get told is that since I have my monthly every month I'm ovulating and I'm able to conceive. I feel like they just aren't listening.