IUI help!

I'm currently monitoring, going to the doctor twice a week actually. Nothing seems to be going on! I was put on two rounds of clomid first on days 3-7 of my cycle then again on day 20-24.  First round was 50mg next round was 100. I'm currently on cycle day 38 and still nothing. I had blood work done last Friday and my doctor wants to see me this upcoming Friday for another monitoring appt. Has anyone else experienced this? I thought I would have had the procedure done by now! I'm not even at ovulation yet!