Your doctor should be checking your sodium level as part of your yearly check up.
Mine always runs very low and last doctor I had advised me to eat more salt.
My husband drily stated that unless I started eating it right out of the shaker that was going to be impossible.
My last check-up in Nov showed elevated sodium, but they were not worried over it because it fluctuates daily with salt intake and how much water you drink and if it’s summertime and you sweat a lot....................