For the past seven or so months my heart has been scaring me quite a bit. I have phases where for a couple of weeks around three times a day my heart starts beating stronger. I'm not sure if it increases in speed but I get short of breath and every time it scares me. Last week though I had a very bed spell (I hadn't had one of these "events" in a couple of months). It felt as if though time had slowed down and I thought I might be having a heart attack. I was born prematurely though and had to have surgery to close a valve in my heart that hadn't automatically done so when I was born. It changes the direction of blood flow through your heart or something like that. Do you think this could be linked to my previous surgery? Also I am a vegetarian however I do eat fish and lots of it.