Welcome to HCM
We understand your concerns
I went through your problem description. I suggest you not to worry too much. You just came back from hospital. The doctors must have thoroughly examined you. They must have pathologically tested you. They must have given medicines for your ailments including heart problems. Then why worry.
I suggest the pain you are experiencing around left chest could be of anxiety
or gastrities due to some medications. Therefore, don't be panic and you can always ask help from your hospital people. Do it instead of worrying.
Hope this clears your doubt. Available for further clarifications.