how do you handle triggers

I was doing great until recently, in which I got triggered by two different things. One of them I don't really want to mention but it's made me feel not ill enough, the other is being told my friend wouldn't have noticed my restrictive eating had I not told them. I'm slightly underweight, but I'll probably always be chubby in their eyes. I can't get their comment out of my head. I can always tackle my own thoughts, but when it comes to triggers I just can't handle it.