Abdominal pain

Hi all! I have had a weird pain like in-between my ribs and stomach for months. At first it was only occasional and felt like a muscle was pulled or inflamed. But now it's started getting really bad, persistent and now I'm uncomfortable all day and then have really bad pain usually 1-2 hours every day. Been that way for a few weeks. Like it hurts so bad I have to just lay down and wait. Already checked for gallstones and ultrasound of abdomen came back normal. My doctor (who I love and trust btw) thinks it could be acid reflux or something. I just am wondering if anyone has experienced such severe pain with that? I'm taking Pepcid twice a day per her orders, eating very healthy and sometimes take extra strength Tylenol but still hurting every day.