So sorry that you are having to go through this

I have to say, unfortunately, the first thing that sprung to mind was ectopic as well.

I was the same, had this sort of strange bleeding, that was heavier than spotting but not heavy enough to be a period. With mine, my hcg levels dropped but slowly and they sort of hovered. I spent 5 wks bleeding before i queried it because i didnt even know i was pregnant, the bleeding started before AF was due. Had hcg test, it was 74, 5 days later it was 70. They said we could just wait and see what the levels did but they suspected ectopic cos the scan showed nothing. So i told them to go in and look. They did and it was ectopic.

So i dont want to scare you but i think you should definately get a scan to see if they can see anything. Just in case.