Cannot get pregnant after miscarriage

What do I do? I had a miscarriage in January of 2015 at 11 weeks. I had a D&C and got a normal period 8 weeks later. Ever since then, my cycles are like clock work - every 32 days. After a year of trying, doc did an endometrial biopsy. Says I ovulated and all was normal, I just ovulated very late in the cycle. He suggested Clomid. I am currently on my 4th cycle of Clomid (second one at 100mg). I have ovulated every time on it and timed intercourse. I never see even a remotely faint line....I am incredibly discouraged. It's been 14 months and nothing. How can you get pregnant first try and then nothing for 14 months? Did the D&C affect me in a negative way? Has anyone else had this problem? What would the next step be? Because I truly don't know if I'm strong enough to continue this journey. Also side note: I have had two recent ultrasounds and all are normal. No cysts, fibroids or anything.