I am an eighteen year old female, and have been wondering for some time whether or not I am at slight risk for a heart condition. My fingernails are mounded/crested, especially my thumbnails, and I've been told this is often a symptom for heart disease (however, I also chewed my nails quite a bit as a child, so this might have added to it). I am also frequently cold, particularly in my extremities (hands and feet), and wonder if I have poor circulation. From what I've found out at the doctor's, though, my blood pressure always tests as very healthy and athletically fit.
I'm just curious how much of a sign these symptoms are for future heart conditions, and if I should possibly look for any other symptoms that I might be overlooking.