Hi, I Am A 19 Year Old Caucasian Female. I

Hi, I am a 19 year old Caucasian female. I have problems with my abdomen which I'm not trying to self diagnose but I feel like it could be AAA. The area right above my belly button and below the separation in my ribs is very tender at any given time, I cannot put any pressure there whatsoever without pain and discomfort. I can feel a very strong pulsing heartbeat coming from this area. It is also visible to other people. It has been getting worse over the months. My boyfriend and I cannot even cuddle because the weight of his arm is too much. Could this be the start of an Abdominal aortic aneurysm or could this be something else? thanks.