Savina, I get the same thing. I have had it for years, and at first it is really quite scary. I have just gotten used to it now, and try to ignore it when it happens. Sometimes its a bit hard tho. I think the palpatations actually caused my anxiety, as they worried me so much. I also had a CS because of this, (my choice) and will be having another for no 2. Your Docs will take special care of you, so try not to worry too much. Maybe some councelling may help with the anxiety that it is causing you, and I guess lots of questions for your doc can help and prepare you too.
I wish you the very best, take care. xxx