I think it will be fine - if they genuinely suspected an ectopic, it is life threatening and they would scan you as soon as they were able, not monitor your levels. Plus, my understanding is that the pain with an ectopic is severe and sudden and doesn't stop.
I collapsed last week due to food poisoning and severe stomach upset - the hospital thought it was ectopic and scanned me and found it wasnt, that i was around 5 weeks pregnant and that I had ovulated from the left and that there was a cyst on my ovary from that.
Fingers crossed for you.
I also have a follow up scan this friday to see if there is progression as I don't know my LMP and wasnt TTC and I thought i was 6 weeks, the scan showed only a sac and yolk so they need to check it is not another MMC or Blighted Ovum
Good luck
xxx