RN to..Nutritionist? Fused position?

Ok, so I've been an ER RN for approx. 2 years now. I like it, but I get burned out sometimes! I'll admit it. I deal with it, then get up in the morning and do the best I can do. I take care of patients efficiently and with as much compassion as I can muster up! I have my diploma and the plan was to go back to get my BSN.

However, I have found a new interest in nutrition. It just fascinates me how fitness and nutrition makes a huge difference in people's overall health. So, I was wondering..

SHOULD I GO BACK AND GET MY BSN IN NURSING,
and then...
go back to get a degree in nutrition?

OR should I just go back and go for the degree in nutrition?

AND WHAT JOBS WOULD I GET AS AN RN/NUTRITIONIST?

Ultimately, I would like to work a hospital and/or wellness clinic of some sort educating people on the importance of staying fit and the importance of nutrition. I wouldn't mind working for a gym either as a nutritionist/helping with weight loss. Working in a weight loss clinic would be ideal, also. I really believe that the general public need to know the importance of good nutrition to stay healthy!

(Note, I'm 31, married, w/ no kids- so the time is NOW before I DO have kids!!! )

Thanks for any advice or comments in advice Jessica