plan b two days before ovulation (lh surge)

Hope this may help any one that has questions about taking plan b close to ovulation as I did.
Brief summary:
I had unprotected sex 2/18 and took plan b immediately.
2/20 I had unprotected sex again under the impression I was protected. I also took an ovulation test and it tested positive for a lh surge.
So I asked a ob if I was protected from pregnancy both day and if plan b is still effective on women over the suggested weight limit. (200lb)
His response is in the attached photo
Th