Anxiety super early sign of pregnancy?

Jo
My hubby and I are ttc baby #2.  Starting this past Friday (5 dpo), I started to experience extreme anxiety chest pains, cramping, diarrhea, and nausea. It's been 3 days since the symptoms started and it hasn't let up.  I don't normally feel anxiety, especially not this many days in a row.
Has anyone ever heard of anxiety being a super early sign of pregnancy?