Acid reflux or heartburn?

Every time I lie down I feel this acid going up my throat 😖 my throat is literally on fire and the only thing that seems to calm it down for a little is eating ice 🙁 is this acid reflux or heartburn ? What can I take for this? It’s gotten so bad that sometimes I choke when I’m sleeping because of the acid and this just started at 19 weeks pregnant

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