<human>: Can you provide a brief overview of the text?

I'm entirely aware that this is not a forum for medical professionals but I'm freaking out and far away from doctors. Would really appreciate anything you've got to offer!

I've been experiencing chest tightness and some moderate, generalized chest pain on and off for maybe four days. Sometimes it is worse when I draw my breath deeply. It lasts for hours and in day-time I become less aware of it or perhaps it lessens a bit. 

The other night I had really severe heart palpitations and went to a doctor (wan't far away then) who just checked my heart and said I was fine. But that is all he checked. I get dizzy and shaky too, as well as a great deal of general discomfort and coldness. But I figured this might just as well be anxiety from feeling like breathing is restricted (or according to the great big scary web-"doctors", a symptom of emboli). The first time it happened was after a long walk, the first serious exercise in quite a while.

Been looking on the internet but it says nothing about gradual onset of symptoms over days.

I'm 23, had a fat grafting cosmetic operation (fat harvested by liposuction) to correct very tuberous breasts 6 months ago. Spend quite a bit of time on long flights between Canada and Australia. 

I will see a doctor when I get back, but I need to know how urgent this is, maybe someone here can offer some clues.
<bot>: Can an embolism present as repeated spells of (especially chest) symptoms over 4-5 days? Are there any definite symptoms?