Jacqui - So happy you are home and thanks to Kendall for letting us know. Good news the heart appears to be ok. But you really want a definitive reason for the pain you experienced so you can avoid in future.

Re the GI potential. Very true that. GERD can mimic heart pain. So can hiatal hernia. Even cervical tendonitis.

I have Sjogrens which causes spasm in my salivary glands and lower jaw which spreads down to horrid pressure on chest. Very painful, lasts about 20 minutes and I get it almost every day between 3am and 5am. Feels like someone is sitting on my chest. Coughing and brushing my teeth helps to disburse the pain.   

Hope you find answer very soon and have no mre episodes like this.