Fertility Appointment

My husband and I have been ttc for 7 cycles now with no luck. My periods have been very irregular 20 to 45 days. I've been using opks to try and track ovulation with no success since it seems I am not ovulating. I've been so frustrated and discouraged, I finally decided to make a fertility appointment. I'm almost 32 and don't want to run out of time. Has anyone had the same issues or any advice? I could use any support I could get. 😢