I have a long cycle 35-38 day range and I’m breastfeeding currently. I ovulated around cycle day 24 probably or later on, and around 12/13dpo I got my first Bfp, the next morning I started bleeding with no cramps, pink and light red almost, just like a little heavier than spotting but not heavy like period. I bled for about 2/3 days and then I’m still getting positives but I’m worried the line isn’t getting darker. This is the most recent I took yesterday with FRER rapid response

at 19dpo almost a week after that bleed, is it implantation or chemical bleeding? I’m left confused.