Implantation or Early AF?

Samantha • Mom of a beautiful 2 year old, Emmy. Trying to conceive miracle #2, TTC for a year so far with PCOS.
Last night I had some light brown discharge, didnt think too much about it other than it could be implantation bleeding. Today its a little bit heavier but still brown with some occasional bits of pink/red. Not too heavy but I am using a pantyliner. Anyone else experiences this and still gotten a BFP?