Occasionally I wake up suddenly in a panic, dizzy and gasping. Have thought it was from bad allergies, sinus, since sometimes I feel that way to a lesser degree during the day as well. Have been tested and have very bad allergies. If I sleep with less than three pillows, it occurs more often. Could this possibly be sleep apnea instead. Definitely calling my doctor and making an appointment. Years ago I was diagnosed with anxiety and have awakened from an anxiety attack with these same feelings. It gets very confusing as to what is going on. In the past have had sleep studies and not been told that I need a cpap This waking up issue started about four months ago with a bad attack of vertigo that took several days to slowly go away. Have never been quite the same since. Can sleep apnea possibly be a factor?