What could it have been?

Lily-Anne
Yesterday evening I had something when I wiped, I don't even want to call it spotting as there wasn't enough for it to be considered that, but it was a very very very light pink.
I had no pain at all, but I did have some bleeding at 6 weeks that turned out to be nothing.
I am 9 weeks tomorrow, and there has been nothing since.
What could it have been?