Chlomid for men

My husband was diagnosed with a low sperm count in October. Not terribly low but below average. He was out on chlomid in November. I got pregnant in December but it was a chemical pregnancy. We had an appt today to recheck his levels and every looks excellent. His doctor told us it isn’t a matter of if we will get pregnant...it’s just when. I guess my question is have any of you had your husband get on Chlomid? And if so how Lon did it take to get pregnant if you have? Extremely grateful that meds are working, just working on my patience after trying for going on 2 years.