Heart beat

I a19 year old woman and have noticed that my heart beat is faster than most people I know. I am not over weight, in fact I use to be an athlete but stopped because I became injured. I get dizzy all the time, have random severe headaches, shortness of breath, random nausea, and I feel weak and tired all the time. I also break into cold sweats and black spots in front of my eyes like I'm going to pass out but I don't. My resting heart rate can range any where from 96-111 on a bad day. My family has a history of heart problems. I don't know if any of this is normal or if its just anxiety from college. Advice would be great. Thank you :)