Feeling chest tightness. Positive.

After lockdown facing lot of health issue initiated due to anxiety about my health due to covid19. Mostly I'm getting loose stools only once somedays. Then sometimes feel I have something in my throat(sputum) daily morning when I wake up. Then occasionally I get chest tightness nearby armpit while Im anxious and some muscle pains. I'm confused as I'm getting all these symptoms newly after lockdown. I was completely alright before that. My main problem is sometimes when I sit in car and travel I get chest tightness that will be mostly from left armpit to left chest(upside). When I browse it shows that I have some serious issue. I don't have even breathing issue. Please help me. Tell me something positive.