Could you tell me your experience with implantation bleeding?

how many days before expected AF was it?

How long did it last?

What did it look like?

How long after until you tested positive?

I have irregular periods, no idea when I ovulate however I'm CD 30 today my periods have been ranging from 36-43 and today I had slightly coloured spotting/discharge , sometimes when I wiped other times non atall! Not enough for a pad. Slightly confused thought AF had just just came super early but I'm having no blood etc.

Any help is welcome!