My Doctor Told Me I Have A Lazy Heart, I

My doctor told me i have a lazy heart, i get heavy period pains suffer from anemia and recently had my gall bladder out and now this lazy heart thing, but all he said was to drink lots of water ... I do get minor chest pains, i eat healthy, drink lots of water daily and my job requires me to be active on a daily basis yet my body feels drained 24/7