question: Hello,Everytime i go to sleep,night or day, i am almost immediately awoken by a heaviness on my chest and an intense choking feeling in my throat,i have not been able to sleep for almost 2 weeks, my doctor is struggling to find out what is wrong, i also have a fast pulse,resting usually about 80 and about 113 when moving about,i had an echogram a year ago and nothing worng, and have had 3 ecgs recently, all to no avail, do you have any ideas what could be wrong?