AIO for calling my friend big

I posted a tiktok today and my friend who l'm going to call j decided to message me and comment on my weight. I took offence to it and insulted j back. Later I FaceTimed another friend of mine and she wanted to see the conversation so I screen shared to her and she said I was being too harsh and that j was probably only trying to help me. I feel extremely guilty now and bitchy but then again I feel like I was just giving back the same energy. Can anyone tell me if I'm overreacting or not. This isn't the first time she's commented on my weight and she's made other comments before. (also if those goes through and works can anyone explain why I can't post on this community on my main account?)