Feeling ashamed 😔

I recently started a "diet". My doctor monitors it and I've been doing really good. I've lost 6.8 lbs in 5 days. I'm at my highest weight 217.2. I just wanted to be healthy but I feel like I'm becoming a little obsessive about it... Weighing multiple times a day. I accidentally cheated and it triggered me and I made myself throw it up... That was the first time I did that in almost a year. I felt really ashamed 😔... But when I got on the scale, I was down 1.6 lbs from the day before... And that made me feel good. I used to struggle with bulimia and binge eating. I thought I was past this... What the hell is wrong with me?!