Help!!! Clomid clomid clomid.

My cycles are 35 days long. I always get a positive opk on day 20-21. I took clomid this month and today is suppose to be ovulation day and my opks have been negative. Can clomid push back you ovulation date? I did have egg white cm a few days ago but still negative opks. And today is ovulation day and still negative opks :(