Ovulate earlier with CD3-7?

Ladies,
I was on 50mg CD5-9 last month and my doctor said I partially ovulated but it was not successful, so he upped me to 100mg this month and I chose to do CD3-7 vs CD5-9, has anyone found you ovulate sooner with CD3-7 or does your ovulation still come mid cycle? 
I'm just trying to prepare for when to start my OPKs.