hi, i have health anxiety and am really worried about a potential health issue, yesterday (i have no idea how this happened i was just sat watching yt vids) i think i pulled a muscle or something in my shoulder and have been having pain in my shoulder and chest where they both join. its still hurting alot and am worried because i feel like my heart is "clicking" almost.. could this be something serious or am i just panicking about a pulled muscle? im 18 btw and dont have any other physical health conditions.. thanks in advance