Did any of you get a light period when pregnant?

[s]

My period arrived on Thursday. I thought it might be implantation bleeding as it was old and brown at first and then my period came in earnest. The weird thing is that it's almost stopped after 2 days. I now just have spotting. I normally have a very heavy period that lasts 5 days. I've had some clotting with this period.
I'm finding it all a bit bizarre.
Thanks for your time.