Sensation of fluttering and skipped heart beat on waking up after intense night of vivid dreams... should be worried? lasted about 2-3 seconds.

Don't worry: To play it safe, i would get an Anafranil (clomipramine) level to make sure it is not above the therapeutic range, and an ekg as a baseline and to rule prolonged qtc interval. Also, see you family doctor and see what he recommends re: your breathing difficulty and shortness of breath. Pulmonary function tests to rule out asthma may be helpful, and gerd should be ruled out as a cause for chest pain ; breathing d.