Currently in the TWW and I think I might have an implantation bleed but wanted to check with people more knowledgeable than me! Don't temp or use opks so not entirely sure of ov but estimate 10-11dpo. AF is due Thursday but yesterday afternoon and this morning I have had light brown spotting. AF usually starts off bright red and as more of a gush so this is unusual. Am I too late in my cycle for implantation bleed though?