I am a college sophomore and I feel like something is wrong with me . I am 5 foot 8 and 112 pounds . I was always underweight but right now it feels like I can snap any moment like a twig . When I play sports like basketball I tend to avoid contact because I am scared my body will just breakdown . Without facial hair, people would mistake me for a 13 year old. I don’t know how to gain weight either . I have upped my diet , tried many different strategies , and none of it seems to work . Any advice ?