Anyone else have issues with clomid? I was recently diagnosed with pcos and was given clomid. A progesterone test on cd 21 of my first cycle showed that I ovulated. The first two months opks showed that I ovulated the same cd, and my cycle length only varied by 2 days. This month I didn't use opks because I felt like I knew when I would ovulate. Now, my period is 5 days later than my longest cycle length on clomid. I did have all the symptoms of ovulating that I didn't necessarily notice the first two months. Both home pregnancy tests and a blood test were negative. Has anyone ever had their cycle length jump so much while on clomid? Or have you ovulated one month but not the next on the same dosage?