ED TRIGGER I think I have a form of eating disorder TRIGGER

I’ve been trying to lose weight on and off for about a year, I succeeded in losing 2 stone previously but whenever I ate junk I would make myself vomit instantly to get rid of it, and it was becoming a problem so I stopped restricting and re gained the weight but wasn’t making myself vomit which was better in my opinion. Well now I have lost a stone successfully without being restrictive or counting calories, and today got a takeout for lunch, only to run to the bathroom to make my vomit profusely to get rid of the calories or whatever calories I could. I had no warning sign or anything I just straight away felt like I had to get the food out of me, like it was overpowering. Wtf is wrong with me:(