Hi ...sorry another question from me!

I have been having brown and sometimes pinkish spotting for a few days now...since 11dpo...at my BT on monday my progesterone was high and my nurse thinks it's probably implantation bleeding. It stops and starts...sometimes virtually nothing, then some fresh spotting...all light though, I am only wearing a pantyliner during the day. No cramping.
Does it sound like it would still be implantation bleeding? not sure how long to expect it to go for.
Because I've had an ectopic, I am really nervous about any bleeding.
thanks.