Implantation bleeding?

I’m between 9-12 DPO today and should start my period in 3-6 days. This afternoon I started getting light cramps and when I wiped I had some brownish blood on the paper. Nothing in the toilet. I’ve gone to the bathroom 2 more times and it’s the same thing, very little on my underwear. My periods are super heavy and frequently late but never early. What are the chances this could be implantation bleeding? 🤞🏼

We have been TTC #2 for 7 months, it took us nearly 3 years and a miscarriage to have our daughter who is now 14 months!