I'm Taking Crinone As A Fertility Drug For IUI Treatments.

I'm taking crinone as a fertility drug for IUI treatments. I had my last IUI procedure 2-1/2 weeks ago but tested negative two weeks after (4 days ago, via a blood test). I was also supposed to get my period 4 days ago but haven't. I am never late for my period so I'm wondering if the drug crinone has had an impact on my cycle. Note that I stopped taking crinone as directed 4 days ago when I found out that I wasn't pregnant.
The only other drugs I've have taken in the past month are Serophene (to increase my follicle count before IUI) and Ovidrel injection to trigger the ovulation. Any thoughts?