Understanding Vitamin importance

Four MD’s seem to not value the importance of vitamin deficiencies and it’s interesting how I’ve bought into their apathy.
One of my VA pcp’S said to me: “ if you’ve been to one VAMC ( MC medical center ) then you’ve been to ONE VA. He told me that when I tried sharing with him what the FL VA was doing on a regular basis. In essence it was a shoulder shrug. He didn’t care and was not interested because he was here and not there and in fact he suggested that I go there is I was so impressed with the way that they conducted their procedures.
Last year the FL VA did a blood test that included B12 and D. Mine was so low that the nurse told me in 20 years she had never seen such low numbers. I immediately contact my home state pcp doc by secured message and he never replied. Months went by and the only reply I got was from his pharmacy consultant who I mistakingly called “ NURSE “ she dressed me down for not acknowledging her PhD in pharmacology. I sincerely apologized because I honestly did not know of her degree which I’m sure she studied heard to get but in spite of her PhD she also read me the riot act about the amount of B12 that I was taking within a given time frame. PhDs MDs and most medical professionals are firmly convinced that there is nothing the can learn from a patient.
My point to her was simple: take a test. If I’ve taken too much then it will show. I managed to get it taken and the results were high/normal. Her reply was that “ over time it will rise and you will be in the high range” The lab that took the test disagreed with her and over time the number went down.
But the D was not changing with 5000 units in pill form, sitting in the sun without sunscreen for most of two weeks, and focusing on non animal flesh D products. My number which started at .64 raised to 1.02 I purchased liquid D3 5000 units with an eye dropper and used it three times a day. No doctor required me to get my level tested. 9 months later my hometown VA pcp gave me a lecture about how no one knows the importance of vitamin D but he appeased me and added a test for D. Much to my surprised he sent me a letter to advise me that my B12 was down again but still low normal but my D was still considered critically low. He included an RX for 50000 units of D2 with 13 pills. No orders for follow up test.
Last Sunday I spent most of the day doing research on consequences of D deficiency. OMG! Every symptom that I’ve struggled with for over a year was listen including my hospitalization for digestive problems deemed small bowl obstruction. Now I’m not even sure about that.
I can list every new and major complaint but the three that surprise me the most is profuse sweating, h ot and cold swings which every doctor joked about “ menopause , and bizarre urination patterns. I tell myself everyday that I wish that I can wear a body camera like the police wear. Then I can post what I’m told and what the doctors don’t do. I also imagine the Charlie Brown cartoon with arrogant, holyer than though MDs hearing blah, blah, blah as they are not interested, have not time, and think patients are idiots who read too much internet.