question: November 2nd I found out I was pregnant at the ER with HCG levels at 1468. 2 days later, my HCG dropped to 485. That s when the nurse told me over the phone that I had a miscarriage. On November 12, I went in for my my 3rd blood draw to make sure my HCG was going down the way it should and instead it went UP! My HCG shot up to 762! What would cause my HCG to drop and go back up?