Implantation Bleeding - When Did You Experience?

Jennifer • TTC baby #1 since 09/2016. 7 IUIs, 2 IVF egg retrievals, 3 embryo transfers, 2 miscarriages. Norah Josephine born 8/9/21!
Hi ladies (and gents)!
I'm scheduled for AF this Friday or Saturday and I rarely spot before my period, but I did 10 DPO last month (no pregnancy) and then again today, which is the same: 10 DPO this cycle.
My cycles are usually 27 days long, which makes me think 10 DPO is a little late for implantation bleeding. But like I said, spotting between periods - aside from this month and last - is pretty rare for me.
Any advice/experiences you can share would be appreciated. This TWW is so hard, and I don't want to get my hopes up.