IB or ovulation spotting?

I had two cycles of the depo shot three years ago and it messed with my system. I haven’t had a period since so my OB prescribed Provera to force a bleed. It worked as noted below, and although Provera doesn’t guarantee ovulation, I felt like I was ovulation when glow predicted I would. I tested my cm and it was mostly watery, some EW... My cp was high and soft. I was getting one sided cramps and would get sudden short episodes of nausea. FF to today and I saw this brown discharge when wiping. Could it be implantation bleeding this soon after alleged ovulation? Or could it just be ovulation spotting that arrived a bit later than all the other symptoms?