BFP after implantation bleeding

I’m about 13DPO give or take been testing since 9DPO but have only had negatives even today and my period is due in about 3 days, I just went to the toilet and when I wiped had yellowish cm and bit of brown blood no more then a teaspoon in size! could this be implantation bleeding? I have two kids and have never had it before with either of them that I can remember. I haven’t had anymore blood since at all.

How long after IB did you get a BFP? wondering when I should test again!!!