Need some reassurance

I’m on day 7 now of quitting. I was a heavy user, all day daily thc cart or flower. at first it wasn’t as bad, now I feel like my chest is tightening taking breaths, and it’s difficult to breathe. Went and got tests and my heart/lungs didn’t have anything concerning. Did anyone else have this? I feel like everyday I have different symptoms that are worse or scarier than before. I know I’m never smoking again at this point. How long until you all felt relatively normal again?