Fertility Clinic

Sooo I have been TTC baby #2 about a year to a little over a year. And I feel like I am coming to the last little hope I have to conceive. I feel like I have tried it all. Metformin, Diet, Vitex, Progesterone, Clomid, Prenatals, opk, appointment after appointment at my OB. So now my last resort is to go to my local Fertility Clinic, recommended by my OB. I have PCOS and its such a struggle. Idk what they might say or recommend me to do. Will it be expensive? Ladies tell me about your journey/experiences or questions I can ask. Thanks for your time.