Heartburn as symptom?

I do sometimes get heartburn however this last week my heart burn has been so bad!

On Saturday morning I woke up in so much pain thinking I was going to be sick it was so bad

Had anyone had this as a early symptom?

Glow says Due today but last month I came on on the 25th so thought i would this month too however 28 days from 25/12/18 is today? Help

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