Pregnancy symptom? throat burning sensation?

Jenny
Hi! I've never had heart burns before so I'm not sure what it feels like. This is my first pregnancy and I am now 22 weeks and 3 days... 
I've been having this throat burning feeling as if I threw up and the acid is just burning my throat? (But I HAVE NOT thrown up).  Is it a part of a pregnancy symptom? Has anyone had this before? Please explain! It's been on and off for 3 days. 

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