AF or my BFP

Shannon
Yesterday I started cramping. It was followed by a heavy cm (consistency and color of lotion). I just went to the bathroom and had a bit of spotting (light red). It was more watery than my period or spotting before my period and mixed with the cam from yesterday. 
Typically when af starts I spot brown for a couple of days. This has not happened yet. Is this AF, or my BFP
Thoughts????