In general, you ovulate 7-10 days after your last clomid pill but I've read heaps of stories online of women ovulating really soon after their final pill and really late. On my first round of clomid CD2-6, I ovulated CD18+ (But I had pneumonia at the start/during treatment).
Are you being monitored via ultrasound or anything? That'll give a much better indication of potential ovulation.

good luck. I hope you only need this one round.