i am having really bad shortness of breath while trying to sleep, my right side will go numb and my heart races feel sick, palpritations, like a strangling feeling it the throat, sinking feeling into the bed, and i tight chest, this has been happening for 9 months and steadly getting worse, i have been diagnosed with anxiety disorder, and i take citalipram 10mg. i have been taking this for 6 mmonths, i have had all kinds of blood tests done for my dizzy spells during the day a mri of the head which olny showed a pituitary cyst. i have had a ultrasound of my neck ct scan of sinusis and EEG and a which is all normal, what do u think this could be ?