Heart palpitations

Okay guys a little back ground info before I jump into the whole story , it going to be long so bare with me here :) okay so at three I was diagnosed with a heart murmer , i eventually grew out of it . Well when I was in 9th grade i started noticing random sharp pains in my upper right side of my chests I went to the ER , they related it to stress .. Poor eating habits blah blah blah .. We'll it kept happening and after countless EKG and test I was told I have an irregular heart beat and was diagnosed with chest pain (don't remember the correct term) but it is basically chest pain for no reason because everything is fine . We'll after I had my son I started noticing I would get heart palpitations randomly , it doesn't hurt .. It just feels like a really quick fluttering in my chest for several seconds and it's sorta frightening .. I've read where this is common and and be due to several changes , And isn't anything to stress over but I'm  wondering with my history if I shouldn't mention it to my doctor . Any insight , or similar expirences anyone ?