Possible implantation bleeding

My period is due around this time, my breast have been very achy lately and I’ve been very emotional. When I went to the bathroom when I woke up I was surprised to see blood on the tissue. I immediately put a pad on but after a few hours I noticed there was only 2-3 drops of blood on the pad and there is no flow. I’m only barely spotting when I wipe. Could this be a sign I’m pregnant? My periods start off heavy so this light bleeding is irregular