Is it anxiety?

Hello anxiety people. I need your guys' perspective...
I've been ridiculously stressed for the past 6 months ever since I started a tough course and was forces to move from my apartment to an incredibly small one. I failed the course and will have to study pretty hard this summer to pass it. The last course of the semester just finished, but the 5 days before the final test, I was feeling like I was about to have a heart attack just about every day. Even if I passed it well, I'm still feeling very anxious. Somewhere along the line, me not eating so much (partly because of me not having the time or energy to cook food) seems to have turned into me being scared of eating. I'm like hyperfocusing on the feeling of swallowing food and it's come to the point where my doctor thought I was fasting (I'm not). I tried sertraline to see if it would help but it made my anxiety INSANELY worse but at first I was feeling amazing and anxiety-free. (So basically it was just a placebo).

Just now, I was eating some of my favorite bread and I coated it in more butter than usual. I facetimed my gf while eating to ease my anxiety but I still felt a small bit of bread near my esophagus. I'm just scared, then, that that food will get inhaled and that this is a "wrong" sensation. I'm seeing a psychologist about my anxiety and will ask about this next time I see him but...

To my question!! Is it normal to feel food at the back of your throat after chewing and swallowing some? It's freaking me out. I just need some sense talked into me I suppose.

Thx!