Implantation bleeding?

Sorry if this is tmi... Basically I'm not due for a few days. I went to the bathroom this morning and I thought AF was here because when I wiped there was a little EWCM with brown in it so naturally I assumed it was old blood. Then I hadn't been to the bathroom all day and I went just now, expecting there to be blood or more brown blood at least, but again a small amount of EWCM and brown in it. Exactly the same amount as this morning not any heavier. No cramping or any signs of AF. Could it be IB?