On 10/4 I had an iui procedure. On 10/14 I started spotting, really just when wiping. Very light with mucus, so I was getting optimistic. Today on 10/16 I had one "clot" that was more red then brown a couple hours ago then just very light brown when wiping. I still would not be expecting af for another two days. Could this still be implantation bleeding or is it more likely my period coming early?