unexplained symptoms and Terry's nails

[El10]

Hi, I'm 26 y.o male with no liver diease/kidney disease/ diabetes or other known conditions. In the last year I started to suffer from unexplained serious symtpoms. The first one was hair loss. Hundreds of hairs are falling each day from all over the head including eyelashes and eyebrows(diagnosed by my derm as Telogen Effluvium). Then, came muscle pains, stomach pains, GI weird sounds,unexplained weight loss, memory problems, concentration problems, weird white smooth coating on the tongue, white ridged nails with red tips that looks like Terry's nails(always been smooth and uniformly pink) ,fatigue,vision problems(it comes and goes. blurred vision), tingling in hands and feet,anxeity, tinnitus and really bad insomnia. Blood test are all good(thyroid hormones are optimal, no antibodies for TPO or Thyroglubulin, vitamin D, zinc,iron, ferritin,no liver issues or diabetes ). My B12 was 300(I was vegetarian for 10 years) and I have atrophic gastritis diagnosed by gastroscopy. I got 35 cyanocobalamin injections over two months by my dr and some of my symptoms improved but some still persists even after months of treatment. Before the shots I took B12 methylcobalamin sublingual but it didn't help at all. My B12 is now above 2000. My dr stopped the injections but I still have symptoms. My nails are still ridged and white. I still have hair loss, tingling in feet that comes and goes and memory problems. I'm adding a pic of my nails. Its not so clear but they are ridged and most of them white without lanula and there is a thin red strip at the top. My doctor doesn't know what is the cause for all of my symptoms. I have lately severe muscle pains and excruciating stab pain in my right leg. It feels like its coming from my nerves. P.S my father has some of my symptoms, he eats meat everyday and he has b12 of 210. I would really appreciate if someone have similar nails or symptoms and can shed a light on my situation. Thank you very much!.