I have been feeling like I had a bubble on my upper left rib cage. When i push down on it it feels like a bubble popping or something, its weird. I dont know if laying on my stomach caused it but I was laying on my stomach and I got up because I felt a sharp pain. I pressed down on the area and it felt like a bubble or something. I have also felt like Im going to pass out and my blood pressure has been low. Im just a teen, is this normal?