 [ Symptoms ] had a cough for a week and when i go to bed i get a drowning sensation i barely get sleep what is wrong  i drink a cup of tea to sooth my throat take my antibiotic and a cough drop and the drowning sensation wont go away i would cough and gag i get headaches and feel very weak not sure what is going on [ Disease ] it stands for nephrogenic systemic fibrosis or nsf now it many mean something entirely different to your doctor have you been diagnosed with this