I feel so alone in the fact that bulimia made me gain weight, it just feels horrible idk what to do??? (Advice appreciated)

(Btw im seventeen and im diagnosed with bulimia, and starting treatment soon)

Like the title says I feel alone in the fact that I’ve gained weight due to my bulimia, and logically I know that I can’t be the only one who’s gained weight but I feel like I am.

Like everyone I see with bulimia is just skinny and I wasn’t even skinny to begin with, it just makes me feel less worthy somehow. Like I’m still stuck in this disgusting body that I just feel worse about everyday.

I also know that weight doesn’t determine whether you have an ED or not, but I still can’t let go of those thoughts and feelings. I feel less worthy and less valid in my struggle, because I keep gaining weight and it just makes me feel absolutely miserable and I feel so fucking alone. The fact that it’s only been really bad for like a bit more than half a year makes me feel even worse, I’ve gained so much weight since then and I just feel disgusting. I don’t know what to do atp??

If anyone has advice or encouragement that would be appreciated.