Son, it's your heart causing your skin burning sensations, and very much not likely a neurological problem. This is because of your history of quite serious heart problems, whatever the diagnosis, and because several things can cause that skin burning sign, one of which is a cardiovascular problem!
Now, on the Vitamin D thing, that can most surely create your heart problems. Some people are prone to low Vit D if they have perhaps a digestive disorder to where they don't absorb it well, or being overweight, and several other reasons. Could be your father had a similar problem, becuz heart problems can lead to diabetes, which he had that. One non-inherited reason for low Vit D is if you are a vegetarian, you won't get enough Vit D unless you are sure to eat non-meat foods that have it in them: spinach, soybeans, turnip greens, molasses and almonds. And I am supposing you realize the meat items that have it in them are of course milk, swiss cheese, and salmon, as a few.
Since your Vitamin D was low when your heart first had a problem in the U.S. when it began beating awfully fast and you went into surgery, we can surely suppose that is probably the main cause of your heart problems. And again, you are showing signs of heart trouble with the skin sensations you have, and your other symptoms too. Obviously you must have your blood drawn to check for vitamin/mineral deficiencies, and see where that Vitamin D is. Could be supplements again for a while, and then making dang sure you eat lots and lots of stuff all the time with that in it, like keeping a roll of cheese in your pocket and chewing on it all day perhaps, that this will "cure" you of your symptoms.
But in the meantime, while it's fine to go to the neuro, because it's POSSIBLE something else is at work here, because the heart can go wild not just from Vit D, but also neurological strangeness, I personally think you need to go to your nearest ER as soon as possible, like tomorrow, and in addition to correcting your Vit D situation for you there, you really do need an exact diagnosis of your heart condition, because some surgical interventions hinge on that being correct, which I think a pacemaker might be exactly what you need, in addition to a new set of meds based on what the cardio doc there decides..
As for your tremendous anxiety, I know exactly why you are feeling that. When a person gets anxious, be it from being actually fearful to being physically goofed up somehow, the heart will always beat rapidly in conjunction with anxiety. And it works both ways, you see. If you heart starts racing for whatever reason, you WILL GET ANXIOUS. For example, I have panic disorder, and so whenever I get an attack, I do deep breathing to bring my heartrate down, and my panic subsequently settles down, too.
So, I will offer this, as a small bit of help, that whenever that comes over you, of course your heart is causing this, so you may breathe in very deeply, fill those lungs, hold it for just one or two seconds, and then blow it ALL out. Then breathe normally a few times. Do another deep breathing thing, then breathe normally. You may have to do it four or five times, but if you'll keep your fingers on your wrist pulse, you will find that your heartrate WILL go down, and thus so will the anxiety you have to deal with on account of your heart condition. I do deep breathing, without holding it in a second, all the time, just to keep my anxiety down. I was in a car accident and never really got over it; it was rather a bad situation.
If you do not think the ER will be much help or if you go and they are NO help, then a cardiologist should be in your future, assuming the medical programme in your country will "let you" go to one, and you need to go like tomorrow, altho usuallly you have to wait a century to see one. So, that's why the ER, and you should mention you need a cardiologist because you are a heart attack patient. That should get their attention and you should get the correct specialist to come down and have a look at you and listen to your latest symptoms, and hopefully he will straighten you out enough to where you won't die between now and your neuro and your soon-to-be arranged cardio appointments. Let us know what happens. GG
I'm just bumping this up, JROCKFORD, since you posted twice. GG