Confusion.

I had sex every fertile day last month and some more. (Checked CM) I got what I thought was implantation. (A week later, I think 11 days after sex) it was very light and by the book implantation. I did that for a day and a half, for 2 and a half days after I bled (still not many clots, but mostly heavier) I had decided after that "ended" I've now been lightly spotting for 2 days. What's happening to me? Could I be pregnant?