Struggling with Bulimia: Seeking Advice

I wasn't diagnosed bulimic but I'm here to get opinions from people who are -- I think I might have bulimia. I started a medication in late 2021 that caused a lot of nausea and vomiting -- the med kind of treats your body like you've had gastric bypass, so I would eat a normal amount that my body could handle before I started the med and unintentionally end up throwing up. This usually happened every day after dinner, because I couldn't seem to stop myself from eating the whole plate and end up overdoing it, but I didn't throw up on purpose, at least at first. Around December/January I decided to start dieting to lose weight and hopefully fix my every severe body image issues and my daily routine became no breakfast, a very small lunch, and a huge dinner that I would purge. I would feel guilty about eating and purging would help ease that. lost 15 pounds before the beginning of May, when finals and graduation became too much and I decided to stop dieting. I stopped watching my calories, I stopped throwing up. I even stopped feeling guilty. My mindset completely changed. But when school was done and I decided to resume my diet, the guilt all came back and it's even worse now. My tolerance to the medicine that made me sick changed so I will find myself going out of my way to make myself sick so I can throw up, or else I'll kick myself all day for eating too much. The reason I think I might Not have bulimia. I have a friend that struggled for a very long time with anorexia and bulimia and she described it as an addiction that's very difficult to stop. She went to a rehab to get better and struggled for years, but I was just able to let it go by telling myself I was already too stressed to handle a diet. Any advice?