Hi Frankie, 
I recently done an IUI and requested to go clomid free as the cycle before I was on 25mgs day 3 - 7  and I responded with 3 dominate follicles therefor they canceled the cycle as the risk of multiple pregnancy was too high.
This time I said I didnt want to be on clomid they said NO, I have to go on it because they want 2 follicles to up my chance or pregnancy! So I negotiated with them and the outcome I was put on a micro dose of 25mgs (half a tab) for 2 days only ( day 3 & 4 ) 
This was CHCH FA and I do ovulate on my own. I didnt need to have the trigger injection either 
 
They kept saying to me they want to see 2 dominate follicles  but Im sure the would not cancel if you only had one! rather strange to me!! 
 
 
I would ring and have a chat to the nurses and see what they say 
 
 
GL