Burping up stomach acid a sign of early pregnancy?

Not necessarily.: Possible early pregnancy sxs: no period, breast swelling ; tenderness w darkened areolas, thin, white ; milky vaginal discharge, fatigue, ^ urination frequency, constipation, bloating, heartburn, backache, cramping, headache, food cravings or aversions, ^ sense of smell, enlarged waist, feeling faint/dizzy, mood swings, ^ gas, insomnia, gagging ; yawning. They may begin after missed period.