Hmmmm, it would be very unprofessional for the people who admitted you to talk. They would risk their jobs by doing so. I am pretty sure you have nothing to fear. Why would you think the people were laughing about you. I would try to not take these observations of yours personally. I realise that is a hard thing to do. Unless you have hard core evidence otherwise, go on the assumption however no one has a clue. Also, consider what kind of damage this would do if they did. How in the long run will this hurt you? If then, these people do in fact know and have said anything the best defence is a good offence. Hold your head up high and do your best to muster an air of confidence. Try not to play into the stigma you fear these people have.