I'm a bit concerned about this flickering feeling I've been having in my right chest for the past 45 days. Sometimes it also aches a little, and it happens regularly, like every 15 to 20 minutes, lasting for about 45 seconds. It's near the rib area, and I've noticed my heart's beating faster too. My blood pressure is 13086. Is this something serious? I don't have any other issues, no cough or fever, and I can breathe fine, but this has got me worried. What could it be?