I would make a trip to the OBGYN about 10-14 days after the end of my period (or whatever the mid-way point of your own cycle is--if you have a 28-day cycle--go in on day 14--my cycles are long and have been since children--about 35-40 days)--you'll be right about the time when ovulation "usually" (you can't actually say "usually" because literally every woman is different--it's more like an average statistic) is scheduled to happen. If the issue is ovulation, then if the doctor is using ultrasound they can look at the condition of the ovaries and what exactly is/is not happening. Before you go in, I would sit down and think about all the factors in your life that might be preventing pregnancy--you need also to factor in your husband/boyfriend/partner--his health matters too even if you don't think the primary issue is with him. Also think about your own lifestyle (work, sleep, diet, stress levels). I would just write down some notes and also any questions you might have--that way you can be involved in the process more.
As far as female OBGYNs...unfortunately I've had next to no luck with finding a good one of those--the ones I've seen I absolutely would not recommend again. I'm sure you can find a lot of OBGYN recommendations on this site, though.