I am a very petite x-small frame and my ankles, knees and wrists, are very skinny, how can i make them thick?

I am a 43 year old Latino woman, 5'2 and weigh 118lb, i am suppose to be normal and i look very very skinny, i am very self conscious of my legs and feel embarrassed to show them off. I do work out 3 times a week. Running, elliptical trainer, stair master, yoga every morning, i have tried lifting weights, take 45 grams of lean whey protein every single day, and nothing makes me look thicker from my legs!!! is there any supplement that i should tried?