I'm a bit concerned because this morning and afternoon I noticed I'm having some trouble with shortness of breath and some on-and-off pain in my left armpit area. I went for a 4 km walk this evening and felt a bit better afterward, with not as much shortness of breath. Could these symptoms be related to my recent COVID recovery a few months ago? I used fabiflu, dolo, and multivitamins during that time. Also, I've had gastric issues that seem to have worsened post-COVID, and I'm on suloxid o for that. What could be going on with me?