Heart Condition: Is it Normal to Feel This Way?

so when I was born, I had a hole in my heart. they figured it out when I was around two, and started watching it to see if it go bigger as a grew, but it seemed like the opposite was true, that it was getting smaller. which was a blessing, so that I didn't need a surgery. however, nowadays, it still feels like it affects me ? like nothing life threatening but I run out of breath really easy, my heart pumps really hard a lot out of nowhere (like I'm just sitting down doing nothing and then my heart just go THA-THUMP real hard for a couple seconds) and Im wondering if maybe it never fully closed, or if it reopened, or a fun secret third thing (no one likes the secret third thing)