Ectopic pregnancy, Hcg levels

Jenel
Aloha.
I'm almost 5 weeks pregnant and my hCG levels are 8295 and my pro is 30.5.  I went in early due to spotting for U/S.  Innitially the doc said everything was going fine....levels are increasing well.  Now, today she says she sees the sac (possibly in the wrong spot of the uterus) but no heart beat.  She tells me it may not be viable because no heartbeat or could be ectopic?  Isn't soon to see a heartbeat?