I have no idea why you are so concerned about autoimmune hepatitis.
There's nothing in your posts that suggests this.
What are you doing for the low vitamin D?
I hope you are taking a high dose of D3 supplement, like 5000 UI or more.
There are just too many health issues associated with low vitamin D, so there's no need to go into very lengthy investigations, if this is not corrected.
The body has vitamin D receptors everywhere and BTW vitamin D is a Hormone affecting about 300 genes and numerous functions.
This is something which should not be taken lightly!
Another thing you can try is magnesium supplementation.
Some of your symptoms like fast heart rate may have to do with low magnesium.
Magnesium is by far the most important mineral in the body,
One of the best forms is Magnesium Chloride Hexahydrate, in a 25gr/L
solution with spring water and dose is 125 ml sipped slowly and repeated every 6-8 hours. Don't be deterred by the possibility of mild laxative effects. It is quite normal and it would be only temporary.
As an adjunct for even higher absorption would be to do transdermal magnesium oil treatments every couple days.
magnesium oil = 1/2 magnesium chloride flakes + 1/2 water.
After dissolving, put in spray bottle, spray entire body minus sensitive parts, leave on for 20' and then shower.
Very fundamental/constitutional remedy with many health benefits!
if you have any questions, let me know.
Best wishes,
Niko