I think I might have an eating disorder

Im not good with putting things to words so I hope this is good enough. For about 3 years I have been on and off with eating and not eating sometimes I would not eat for a whole mouth. Right now I have not ate anything in about a week. I dont know if I have an eating disorder or not. When I do eat I feel extremely disgusted in myself. The times were Im actually eating are very slim and rarely happen. I dont know but every time I try to stop I just start again.