Hi, and thanks for your medical question on eHealth forum!
I am sorry for the late reply and I know by now you know your condition. Yes, this does sound like a eating disorder. You appear to be very conscious of your weight. I suggest you join a good nutrition expert, a dietician, a physical trainer, and a counselor. You also need to rule out diabetes, PCOD, and hypothyroidism as cause of weight.
Since a confirmed diagnosis cannot be given on net please discuss these possibilities with your doctor. Hope this helps. Take care!