Heartburn? Gallbladder? Help!

I have felt perfectly fine all day. Then all of a sudden, and I do mean all of a sudden, I got this god awful pain right where my rib cage is and radiated into my whole back. Sometimes when I drink I’ll get this pain and I drink milk and it goes away, so I thought it was heartburn but this was 100x worse. I was ready to go to the ER. I couldn’t walk, every position hurt. I drank milk and shoved my fingers down my throat and threw up sooo much. Instant relief. About 5 minutes later it started coming back but not as intense, so I drank some more milk and now I feel 100% better. This all happened within 15 min! I know this is a very detailed post but just wondering if anyone else has had this problem. It really scared me. Any advice would be appreciated!