I'm having a very similar problem I had a hernia surgery the end of june 2020 and about a week later I was lying in bed and had this chest pain/pressure so I stayed up all night told my wife we went to er I have sense been to the er 4 times heart dr has done test says not a heart issue I have been to stomach dr he ran scope down and took biopsies all came back good its will go away sometimes for a week or so but come right back it's starting to mess with my head a little bit sometimes I get a little dizzy to some days are better than others I just need help getting this fixed