Peak after peak

So I know your not suppose to test after you receive your first peak on clearblue digital but I did. I’m very confused now. I peaked on Friday and I know again that your not suppose to look at the lines on them bc they don’t mean much well anyways I tested Friday got my peak with medium lines. I tested yesterday after the peak went away and it was a blank face. I test again this afternoon and it was peak again with very dark lines. Just wondering if I should go by the first peak or second.