If she is breathing heavy and is stiff she is scared. If you are not seeing any discharge or bubbles from her mouth and is not "stargazing" odds are there is no RI. Do as lance said and just let her chill out. If you keep trying to feed her often it will just freak her out more. I know its very tempting to play with your new pet, but ideally you want her to eat for you before you mess with her too much. How old is she? About what does she weigh?