Implantation bleeding?

I don’t have any experience with this, I didn’t have it with my first. I’m either 10 or 11 dpo. Minor cramping 9 dpo, started spotting around noon today. Only light pink or brownish color. Very light and almost wouldn’t have know it if I didn’t check my CM and could only see it when I wiped a few times. So I’ve been spotting for 12 hours now and usually AF doesn’t hesitate that much. If this continues, when would you wait to test. How long after IB does it take to get a BFP?