Implantation bleeding or chemical?

Hi ladies, I’ve had a previous ectopic and miscarriage in the past six months. I’m 10 or 11 dpo and got a faint line on FRER yesterday and darkening today (but still faint). I have just been to the toilet and when I wiped there was bright pink blood (a small amount) and I haven’t had any since. Naturally I assumed it was a CP however I haven’t had any since and it’s been an hour or so. My question is, has this happened to anyone and they gone on to a healthy pregnancy? I will keep testing every morning to ensure a darkening line and get bloods done but want some reassurance this might be IB.