I don't know what job you have, but it sounds very stressfull (=anxiety). If it is what gets you up in the morning, that is your good mental health goal I think.

You aren't really believing your nutritionist, I'd find a new one if I were you. I don't know if you live in a large city or not, but there are many good ones. The family practice doctor I used to work for did a test for some of her patients who wanted to do things without medicine. She would order a specific (many) number of blood tests to check the nuitrients that patient was lacking. Then they supplimented them. She dealt with a lot of patients with fibromyaligia at the time, so many of them didn't sleep well and getting the proper vitimans and minerals was so important. Also that group of patients had other specific shortages.

anyway, my point is that proper nuitrition is very important to well being. Insurance didn't pay for this group of tests, but it may be worth will for you to pay out of pocket, and tell the doctor you see the need to keep it from the employer due to job security. they will work with you (if they want to get paid). The doctor I worked for was an osteopathic doctor. If you like, I could try to find out what tests she used to order.
Let us know how you are doing if you like. We are all here to help each other. If you are more comfortable send me an private message.