I saw a case at the airport where a guy initially came exactly like urs and didnt have a stamp , but started working on H1B and tried using AP.
The immigration officers first question was why he didnt stamp it in India during his visit. He asked him to make travel arrangements to travel back to India.
I was at the scene for around 30 minutes and he was checking with airlines to see if he could take a connecting flight to India.
Immigration Officers dont appreciate us entering without stamping especially when we are changing status from F1 to H1.
BTW, Can I know why you dont want to get your visa stamped in India?
I am sure you are travelling on AP that you obtained from your school when working on your EAD? Correct me if I m wrong.