BFP but very light spotting? possibly tmi and kinda long

Hey ladies! So My period is due today or tomorrow. This last Saturday i started having very light spotting when I wiped. I thought my period was coming but was a bit confused because I don't usually spot 4 days in advance. So I put a tampon in and it did pick up a bit of blood. Spotting lasted about 2 hours and then was gone. I tested yesterday morning and got a BFP right away on a FRER. I was a bit shocked as I was positive implantation bleeding would never happen to me (I've had 2 previous babies and never had spotting). So I assumed I was pregnant at this point. Today I just noticed a tiny smear of light pink when I wiped. Put another tampon in and nothing really came out just maybe a small speck of pink mucus.