What's my risk of developing an eating disorder again? WARNING: MAY TRIGGER

I've always been VERY critical of my body. I can remember feeling so fat in elementary school and wanting to lose weight, even though I was at a healthy weight. It progressed in junior high when I started to get fat on my hips, thighs, and arms from puberty. While I was getting bigger, it seemed like all of my friends were stick thin. In high school I was finally able to make myself throw up and gain control over my cravings for food. I went from being 5'4" and 127 lbs to 97 lbs at my lowest weight, which I know isn't CRAZY thin, but it was noticeable. I also purged through exercise. I felt so confident with my body at that time. Then one day my mom confronted me and said she heard me in the bathroom. She made me go to a therapist, a doctor, and a nutritionist and became a food nazi around me. I think part of the reason I had such low self esteem as a kid can be attributed to my mom being overweight. I can remember going into restaurants and she would see a larger woman eating and would ask me "am I as big as that woman over there?" And I would always tell her no, that she was beautiful, even if she was as big as the woman. Now I am in college and it has been a few years since my mom found out about what I had been doing. It seems to have blown over and my parents seem convinced that I am completely over my "overly dramatic high school moment." I do have a better relationship with food and my body than I did, but I will still purge every now and then, not on a regular basis, usually after a particularly large meal when I have the opportunity to get rid of it. I try and exercise regularly with exercise classes at my university, and I weight 117 lbs now. I am wondering if I am over my ED of high school or if I am at risk of losing control again. I don't want to begin purging regularly again because it hurts my chest when I do and I know it is so bad, but I really want to get down to 110 or 105 lbs this summer.