BFP... but spotting 11 & 12 dpo

Hi Everyone,

Well this month I have been lucky enough to get a faint, but positive bfp 3 days in a row.
10dpo, 11dpo (a little darker) & 12 dpo (today & little darker again)
However I have had some very light brownish / cmish (sorry for tmi) spotting / discharge. (not enough to make it to my panties & if I was not on the look out for the possibility of something going wrong - I would not even know it was happening!) Certainly no "fresh red bleeding" at worst one check was pink in colour but then ceased immediatley...
I'm wondering (considering my past & very recent history is driving me nuts atm), if anyone else has experienced anything similar?
Could it be implantation bleeding that has just taken a day or two longer to pass / appear?
I'm praying, praying, praying for a healthy pregnancy & hoping to goodness that this is not the end of the road for us again.
I'm over doctors & blood tests - I'm over hospitals & the bs that comes along with them too, so I figured the only place I could be that would reassure me, was here...
This is a different scenario to my last losses & the first time this has happened. I was so sure I would wake up this morning & af would be in full force - to my suprise she is not. But I wonder about tomorrow??? & the day after & so on...
Just hope it stops all together really soon & I get a super strong bfp!