As long as it was thawed in the fridge and has stayed in the fridge, from a food-safety standpoint it's fine to refreeze. Foodborn illness-causing bacteria won't grow at refrigerator temps, so you should be OK. The issue with refreezing is a textural issue. Freezing ruptures tissue cells, which leak fluid/moisture, so refrozen meat is apt to be drier/tougher when re-cooked. I'd refreeze the chicken but mark it so I make sure to use it in a casserole or soup, rather than as chicken parts for dinner.
(OR if you have time, make the soup or casserole now and freeze that, if you are really worried).