How can I get over being afraid of rapid heart rate?

I started getting panic attacks in February, and now because the feeling of them are so scary, anytime my heart rate goes up I get scared and it brings on a panic attack. I'm a healthy 21 year old girl, but I just get so scared when I get a panic attack like the feeling that I'm about to die. I can't work out, walk fast, do laundry, or even bend over cause I don't like the feeling of my heart racing cause of these stupid panic attacks. How can I snap out of this? I wanna live my life normal again without being a afraid of my heart beating fast....