Please help me.

Patient: I’m skinny and I was never like this. I’ve been trying everything I can to gain my body weight back but it’s not working at all. Sometimes I feel like I’m loosing even more weight and self esteem is very low. This has been going on ever since I was 11. I’m now 15 and I don’t know what to do. I get made fun of. I wanna know what can I do in order to gain my body weight back. My wrist bones show a lot and I just wanna know; do I have an eating disorder? Am I anorexic? What can I do?