Mysterious​ health issue. Before then.

Please I need an experience advice. I have been this way for almost 2 years now. My skin is so thin and yellowish. I look very pale, im always cold (this is not due to allergy) even under hot temperature. I'm currently down to 59kg compared to my normal 75kg. My hands are constantly shaking, I lack stamina, I always have headache waking up in the morning. I can't stand the slightest breeze, fan or A.C. I feel cold inside my bones and hip joint especially. when this condition started I fell very ill even though I was treated of malaria few weeks before then. I've not been able to regain my full strength since then, I always have fatigue, it's affecting my work. Currently all my veins are very visible even from a distance. I have ran FBC, Urinalysis, Liver and Glucose, widal test, thyroid function test, HIV and chemical pathology. All of these test came out clean. Kindly advice me properly. Before now I use to workout frequently, so I was very healthy and muscular. I eat and sleep well.