Agree with the other posters above.
If you are looking for more information/resources about what could be going on, I recommend researching the hypothalamic-pituitary-adrenal axis and HPA dysregulation.
To start you off, here is an article that discusses it and what you can do:
You'll see there is no magic bullet. Eat good food (and enough of it), get lots of quality sleep and reduce stress in your life as much as you can. Don't do anything extreme. The "incredibly strict 6 week elimination diet" you went on was most likely an additional stressor that only made matters worse.