What Causes Feeling Of Flutters In Left Breast, Headaches And Dizziness?

I have flutters in my left breast. It doesn't feel like my heart but it could be. I have slight headaches and kinda feel dizzy or lightheaded. Im 40 and overweight. good blood pressure but my triglycerides are high I had my heart checked out and everything was fine but why do I feel like this