I always think that my heart is in pain, I don't know if it real or no. But I am in good health, I am afraid to go to doc.

Wize yet unwize Why? At age, symptomatic heart pain (angina) quite rare (chest wall common), yet atherosclerosis typically begins later childhood, remains asymptomatic for decades. Why? Arteries enlarge http://goo.gl/aRhOU2, opening/blood flow unchanged, yet other diseases can accelerate. Focus on avoiding drivers: LowFat foods & optimize primary internal drivers: lipoproteins, HbA1c & BP to abnormally healthy ranges.