Implantation bleeding

Shelly

Hi everyone, this is my first time posting but I’ve been here a while and read lots of helpful information.

I was wondering if anyone had experienced implantation bleeding and how long after did they test positive? I’ve had two pregnancies (one was not full term) and with both pregnancies the first sign was IB. This will be my second child but I haven’t been pregnant in 10 years! I’m suppose to start AF today or tomorrow but I had spotting 2 days ago. It didn’t fill up a tampon and when I changed the next one came out clean. I tested this morning but got a bfn. TIA