Shortness breath and thinking the worst

for the last week ive had a sharp pain where my heart is unsure what is causing this earlier this year i went to cardiologist because of earlier chest pains and test came back fine and also earlier this year i had shallow breathing every night as is i had a marble in my througt and something was sqaushing my chest! i got a chest xray which all came back fine! but with this new chest pain i have devoloped shallow breathing again that seems deiffernet to the one earlier this year and my anxiety start making me thing i have lung cancer im a 23 year old none smoker but in around smokers all the time! its scary me and i cannot help think the worst.. i dont wanna keep going to doctors every week its getting exhausting.. but then im unsure what to do and if my anxiety is causing this for me, im struggling with new synptoms every week and i dunno how much longer i can deal with this :( can anyone realate to this..

Take anxiety medicine and it’ll go away. Happened to me!

is that to stop the thoughts? cause i canot deal with it anymore

do you have asthma and or allergies ?

nah none of that :confused: