Thank for asking to HCM
I really appreciate your concern, this is not the sign of pregnancy
but this could be acid reflux
disease because of having typical symptoms of this, if I would be your doctor then I would treat you with the following medicines,
1) Tab Omeprazole
40 mg once in day
2) Tab Domeperidone 30 mg once in day
drink plenty of water, nothing to worry about this take care and have nice day.