I want to lose weight but i have asthma and a heart disease so it really hurts to excercise. diets suck. help?

[x_6kiwi6_x]

i have vaso-vagal syncope and asthma and its hard for me to breathe when i excercise. i also have problems eating healthy because for one my mom wont buy healthy food and i have low self-esteem and problems at home and i often use food as comfort. i feel fat. i used to take 10 diet pills a day or id eat only 3 bites every meal and id lose like 4 pounds a day but my friend wud get mad at me and id stop and gain it back. idk what to do. im at the verge of purging. help?!