Hi, 23 yrs is a very young age to think about cardiac disease. Pain in arm is mostly due to musculoskeletal or nerve cause. Acidity and bad food habits are the cause of chest discomfort and reflux Being conscious about heart health is a good thing but panicking self with negative thoughts is detrimental. Adopt a healthy lifestyle from this age and have a goal in life . Practice Meditation, Exercise, Yoga, Healthy food, Hydration, Good sleep and disciplined life. You will definitely stay disease free.