HCG level fluctuating....

Molly
This is a long one just FYI....
So I found out I was pregnant at about 4 weeks 3 days....I had my level confirmed at 25. Two days later I started having heavy bleeding with clotting (Saturday) and went to the doctor Monday. Levels were then 20....doctor said this is consistent with miscarriage which I was guessing.  She wanted me to check my levels in a week to make sure they were going down....I ended up going this morning.  The doctor called saying my levels were crazy (now 245) and that she wants a sonogram ASAP which is scheduled for tomorrow morning.  She discussed this with an OB and she has had one case that it was an ok pregnancy but said this sounds more like ectopic. :(
I'm on an emotional roller coaster!  Has this happened to anyone else?