Implantation bleeding or cycle sorting itself out?

So AF not due for another 2 days and randomly started bleeding today. Usually my periods are mod flow and dark red/brownish (even at the start) but today I’ve had light bleeding and when i first noticed it it was bright red. My cycle is usually like clockwork and I can pin point the moment that AF will come so this is really out the ordinary.

We DTD twice around my fertile window this month. I also came off the pill mid pack in August so not sure if this is implantation bleeding or maybe just my cycle sorting itself out?