BlackRN, I wish I could have an answer for you, but I don't. I'm also an INTJ. I have taken that test twice and received the same result. I believe we don't have a definitive suggestion for you because we are all in the same boat! LOL! It's difficult because I have the same difficulties as you with regard to trying to find a career that I am truly happy working.
It takes me a while to warm up to new people, but once I do, I can be outgoing. Friends and coworkers have told me that their first impressions of me is anywhere from snobbish (due to being quiet) to unfriendly.
I have had many careers in my life and have never had a problem or failure switching to a totally different field. I believe that if I could fail at it, then I would have some guidance with what I am suppose to do.
I enjoy chaos and organizing it into some sort of system. I presently work in the ED and for the most part, enjoy it at this time. I am in my element when it is downright chaotic. My responsibility to my family prevents me from changing careers yet again. I plan to continue my education in nursing (for now) and will look for opportunities within this field. I'm sure there is somewhere where I'll fit in and feel fulfillment in my decision. I share your frustration and wonder if I'll ever find my niche in the workplace.
If I ever figure it out, I'll be sure to tell you.
I just wanted to let you know that you are not alone and that there are others like you. I didn't know that we are 1% of the population. Very interesting indeed.
Best of luck to you.....and if YOU figure it out, please tell us!