Starting HCG

Kris
We have been ttc for 14 months. Took clomid the last 5 months with no luck. This past month I started letrozole. 1st month taking letrozol i didn't get a positive ovulation (I've always gotten a positive ovulation before) we will try one more month on letrozol but will also try hcg this month. Any luck on that combo? Any info on hcg will help too. Thanks