first AF after bubs really really light? or not AF?

Hi ladies

I have PCOS so going forever without AF is not unusual so haven't been suprised that 7 months PP and still no AF. I have however been having weird period-like crampy feelings (you know the "I think AF is on the way" ones) on and off for a cpl of weeks and yesterday I got some brownish spotting so wore a tampon as I was heading out (prob wouldn't have bothered if I was home). Anyway after a few hours thought I would change it to see if anything was going on and the tiniest pink spotting then on the next one nothing. Nothing overnight and nothing today.

So could that have been AF? I have read that a lot of first AF PP is heavy and I'm not a stranger to heavy given the PCOS. I'm still breastfeeding ~6 times/day (sometimes more). Could it be AF or is it ust a precursor? or should I be worried it's something else? I don't have the crampy feelings anymore, in fact haven't had them in a few days, certainly not since the spotting first started. :S

Mine has been really light this time - AF only came back when DS2 was 22 mths & I was expecting really heavy 'cause it was so long but nope! I think its a variation of normal.