Implantation bleeding?

[KateF1107]

I'm currently TTC baby number 2. I came off the pill on 1st July and had my withdrawal bleed shortly after. I have not been tracking ovulation so not sure when I ovulated. On Tuesday evening I had some brown spotting which led to 2 days of light bleeding and now just pink discharge. The exact same thing happened with my first pregnancy, I mistook implantation bleeding for AF. The bleeding this time was red for 2 days but that's how it was first time round. I took a test on Wednesday which was BFN.
I'm not sure if this is AF or implantation... when should I test again? X

I'd wait for a week and test again. Implantation bleeding is so imprecise - some women get it, some don't, and if you do get it, it happens about when you'd be expecting AF anyway so you'd never know. Testing in a week should tell you what is happening. Good luck !