Excessive weight loss and fatigue.

I used to weigh 72 kgs and my waist size was 34 and suddenly I kept on bocoming thinner and thinner as day by day even there is no changes in my diet except I completely left consuming sugar and meat. Now I weigh around 60 kgs with a waist size about 28 in last probably six months and even after I started consuming meat and sugar I kept on losing my weight and it is fluctuating between 58 to 60 kgs day in and day out. I feel very tired and fatigue, burning sensation in my eyes and I feel hungry very often than before and I consume 4 to 5 times a day as compared to when I was weighing 72 kilos but I feel like I am losing excessive weight even after that. Some body suggested you may be suffering from CELIAC and I completely left consuming gluten after that.All my old dresses does not fit me in any more and even after joining a gym I am feeling I am getting thinner day by day. People who saw me a year ago never identified me saying that you have became so weak.I have no bad habits.