Hi all I'm na 21 years old female, From 2 months some weird &amp; scary physical symptoms are going on with me! On 1st sep exactly 2 months back I got Stiffed knees (they are still Stiffed up) without any pain so I went to Rheumatologist &amp; did some blood tests of Rheumatoid arthritis, ANA, etc for autoimmune condition and all results were came out fine except Vitamin D which was very low so I started taking supplements of vitamin D then within 1 week I stared getting random body aches mostly in joints.. I went to Rheumatologist again but he dismissed my concern by saying it's the vitamin D deficiency causing then Random body aches and constant Stiffed up knees now from October (This month) I'm experiencing muscle twitching in all area multiple times in a day in my body and they last for about 3 seconds &amp; also experiencing nerve pain like electric shocks, sometimes cold &amp; hot sensations in some part of my body &amp; from yesterday tingling sensation in my scalp.. I also went to neurologist 3 weeks back but he said it could be Vitamin B deficiency.. can anybody tell what's going on ?? I'm damn Scared! I'm tired of getting normal results and being told it's just a vitamin deficiency but I know there's something clearly going on with me! It's not normal to have Constant Stiffed knees, side joints, Random vibration in muscles, electric Random nerve pain &amp; now tingling scalp! Please Help me out &amp; guide me what to do now? Also one thing I want to mention is that I was in extreme anxiety &amp; stress from 4 months but when these symptoms started to show up I wasn't stressed out from 2 weeks at all and my anxiety was almost gone too! Also I missed my periods &amp; I've read anxiety doesn't impact periods and hormones at all! I'm really scared please help me out!

Apologies for any grammatical errors since English is not my first language