I feel like i get heartburn feeling at least twice a day. what do you think it is? could it be heart problems. also i feel muscle ache right across from shoulder on chest?

You need to have this evaluated to be certain it is not your heart. If it is from gastroesophageal reflux, this can and should be treated. So, see a doctor to rule out a cardiac source-if it is cardiac, a cardiologist is needed. If not, see a GI doctor. Good luck to you!

It would take a physical exam and some tests to help rule out a cardiac cause, which is the most important thing in this scenario. Once a cardiac source is ruled out, a trial of antacids for reflux maybe useful. See your primary care doctor ASAP to get started. If the chest pain is severe, go to the emergency room. Good luck.