Anxiety and panic attacks out of nowhere?

Hello everyone, so about 2 months ago I randomly had a panic attack about 30 minutes after eating food. I felt nauseous and bloated and like I had to go number two also while this was happening. I ate a large high carb meal and I was possibly dehydrated from sweating earlier in the day and not drinking enough water. I felt extremely light headed and like I was going to pass out. I went to the er and they gave me Ativan to calm me down and fluids. Since then I have anxiety about eating because I feel like it makes my stomach bloated and nauseous and I’ve lost a bit of weight. I take Pepcid every day but dont eat enough. I’m in general very anxious and have anxiety that I didn’t used to have then all of a sudden on this day I acquired. I know my mom and dad had h pylori for a fact and got it treated but could I potentially have h pylori? I also went and got the breath test but it came back negative and a doctor said that doing that with antacids can give false negatives or something? My life has been an anxious hell for these past 2 months. I am very very anxious in general and anxious about doing an endoscopy.