What Causes Chronic Weakness, Loss Of Hair And Swelling In Lips?

Really troubled..I am so week loosing my hair feel tired sleepy sneezing my lips swollen I have night fevers its winter and am sweating my body feels like a volcano inside...I have lost so much weight I was 145 lbs am 119 lbs in just 3 months.. I eat a lot to gain the weight but nothing is helping although I eat I feel so week...not take the heat in my body