Clomid ovulation different days?

~B

Hello! Did anyone ovulate different days on separate cycles is clomid? Last month I ovulated on day 12 and this month I’m day 13 and my opk line is still pretty light (plus I’m getting anxiety over it which i know makes it worse!). I’m taking clomid the exact same way as last month. Did anyone ovulate differently than their previous cycle? And if so, how many days different? Thanks!