Which doctor do I go to?

Emily • My husband and I have one beautiful baby girl who was born in February of 2016. 💜
My fiancé and I have been TTC for alert a year and a half. We had a chemical in October of 2013 and nothing since. We are both so young, 18 and 21. I'm trying to figure out if I can go to my regular doctor to get checked out? Or do I have to go to a specialist? We both just want to make sure that we're all okay and healthy fertility wise. Any help or suggestions would be great!