Help! 12 dpo, had a bit of blood once yesterday, rise in bbt, period due today

M

I’m really struggling to understand what’s happening. With my son I got a positive at 10dpo. So I thought i was out yesterday at 11 dpo. No positive, and I had a tiny amount of spotting once when I wiped.

I was expecting a temp dip but it actually got higher this morning. Is it possible to implant this late? My period is due today.