earlier this year i had a month where i couldn't stop having anxiety and/or panic attacks. during that month i constantly felt short of breath that went away when i didn't think about it (but of course i didnt know it was anxiety so i kept thinking about it) and occasional mild chest pain. the shortness of breath and chest pain came before the mental anxiety, so i was convinced it was early stage heart failure. it got so bad that i went to the ER and after several blood tests, an X-ray, and an EKG, they told me i was fine. 

recently, i have started feeling the same shortness of breath, but none of the mental anxiety symptoms, except when i worry too much about my breathing. could this still be anxiety even if i'm not having any of the other usual symptoms?

for reference, i have been under a decent amount of stress lately and am currently trying to stay sober after a couple weeks of excessive weed and alcohol consumption.