I am experiencing fluttering in the middle of my chest and some pain (mostly on touch) or when I drive or move a certain way. I have High blood pressure which I take medication for and suffered a stroke 3 years ago. I have been walking regularly since and exercising (aerobics, weightlifting) regularly for the past 3 months, trying to lose weight. I m not sure if I strained something, or if something is going on with my heart. I went to the ER, but after being there 3 hours, they didn t find anything. I ve had a slight cough as well. Not sure what if anything is going on, but I m nervous.