Is it normal to get heart cramps ? and what might cause them ?

Maybe it's 'precordial catch', it's very common and harmless.

https://en.m.wikipedia.org/wiki/Precordial_catch_syndrome

See a doctor if it's bothering you, it could be lots of things.

That happens to me too >.>

I'm not a doctor but I've experienced chest pain from Costochondritis, where your chest wall gets inflamed which causes the pain. It can be treated with anti-inflammatory medicine such as ibuprofen. Read more here, especially where it shows when to see a doctor http://www.emedicinehealth.com/script/main/mobileart-emh.asp?articlekey=59219#when_should_someone_seek_medical_care_for_costochondritis

lay off the cheeseburgers

If you feel it in the heart region then it's most likely not your heart. Heart pain is mostly felt in mid-chest.