Clomid 3rd round

Okay so I took my 3rd round of clomid this month the first 2 months I ovulated but this month I'm not sure I've been testing with my opk's and haven't gotten a peak yet I'm now on cycle day 26 has anyone ovulated later then normal on clomid my first cycle I ovulated on cd 15 the 2nd cycle day 17 looks like I'll be trying another round next month