What exactly qualifies as ttc...for purposes of seeking medical advice.

So I have been off birth control for 2 years now. For about the first year we tried to prevent pregnancy and were successful. In Jan 2017 we decided we would stop preventing and just let it happen when it happened. Well in June and July I started <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> and timing BD around ovulation. Well In July I did conceived but miscarried in September. We are on our second cycle now of ttc after miscarriage. Between January and June we did have sex at least once most every month during my fertile week I just never conceived. So my question is, do I count Jan as year one of ttc being that we weren’t prevent or do I count July as a year since I did conceive, I just miscarried?