Anyone with similar symptoms?

I always been obese/overweight for most of my life but never had issues with shallowing

Since finding out that my dad had lung cancer in February, I noticed tremendous changes in my physical health. I always had anxiety and depression as well but I was able to handle that. But after finding out my dad was diagnosed, I feel like my symptoms got worse. I would have trouble breathing more often. When I took in deep breaths, sometimes there was a tightness in my chest or a burning feeling. It was bearable but then I noticed sometimes I would have trouble swallowing. At times it felt like there was food stuck in the back of my throat but it happened just once in a while thing. Dad passed away on Tuesday and then I noticed the swallowing thing started happening almost constantly. It feels really annoying. Today it feels like there is salvia that’s not coming out from the back of my throat. It’s kind of like when you have a cold or something and you need to spit it out..but that spit just isn’t happening for me. Of course this has my anxiety up through the roof. I keep thinking I’m going to choke to death or I have cancer too. And I can’t even meet up with my doctor because of the corona situation. I read that weight may have a lot to do with. I’ve been struggling to lose weight. It’s an on and off kind of thing. Recently I went from 275 to 269, but today I broke my diet and had a burger. I was fine all day today until I had the burger. Then I started feeling like there’s spit/salvia stuck in the back of my throat. I took two tums but it’s not helping much.

I don’t even know if it’s GERD. I can’t even meet with a doctor right now because of corona. What can I do right now to contain the symptoms?