How quickly am i going to loose wieght like this?

ok so im 15, 120 lbs, and 5'2. i have an eating dissorder. i was anerexic about a year ago, and even after recovering i started going back to wierd eating habits. well, now i have bulimia, and i hardly eat. ive had bulimia for a month but was eating alot so i didnt loose much wieght, but id say in the past 8 days, ive eaten around 1500 calories all 2gether. yet every time i eat i throw it up, it doesnt matter wat it is whether its a salad, soup, penut butter, or even celery i thow it up. so i dont know if u could say ive eaten 1500 calries or not. but ive lost wieght in matter of days becase my shorts fit looser and i was able to fit into size 1 shorts yesterday. i just cant eat, im scared too eat a full meal. i always eat half or just pick at it so my family thinks im eating something. i throw away food, the other day my bro got me a cookie and i threw it away secretly. ive stopped drinking sodas and diet drinks, i dont even drink my fav thing ever-coke zero. i stopped drinking coffee even tho im addicted to it, i switched to green tea w/ splenda. i do 2,000 jumps on a jump rope every day, 1,000 morning, 1,000 at nite. i also walk my dog on top of that in scorching summer heat. am i going to loose wieght qucikly? wats going to happen? its like i dont wanna go down this path, but i also do want too.im trying to loose the wieght in my thighs and butt mostly.