Im so sorry that you are going through this. I highly, highly recommend seeing an endocrinologist. It could be anything from a thyroid issue or adrenal gland issue (both very treatable, but hard to diagnose). If the first endo you talk to dismisses you, go see a different one. Explain that this is not your normal and that you need help. Like I mentioned, its hard to diagnose these things and they are frequently missed. Please let us know how you are doing too, I hope they can figure out the cause. High thyroid hormones or adrenaline can cause what you are describing though.
Find a different doctor! Something is def wrong. Hope you’ve figured something out by now. Xx
I sometimes have sharp stabbing pains in my chest as well :)