Don't expect any help from HR. HR works for the bosses. HR is likely to do you more harm than good.

As for your rights, you have the right to develop a spine and say "no comment" every time somebody asks you about this. Keep saying it over and over again until you get the message.

If you are the kind of person that's weak and succumbs to pressure at the workplace, then I don't know what to tell you.

If this is too much for you, it's time to seek employment elsewhere.