First positive opk- what are my chances?

C

I just left the doctor's office. I have my first positive opk since we started trying 6 months ago. We must BD every other day from CD10-20 and on CD21 I'll have lab work to confirm ovulation. If this cycle is unsuccessful then I will be referred to a fertility specialist. Is it likely this could be our month?! I'm terrified of visiting a fertility specialist and what they will put me through.