Faint positive , then bleeding ???

So I’m about 12 dpo or so.. i took a test tonight and got a faint pink second line.. however last night i took one and got a complete negative..

Could i still be pregnant? Or is this my period...

Really disappointed..

(I have a 9 month old and had a small implantation bleed with her, just not as much)

It’s probably hard to see cause of the light but this was taken within the time frame and the second line to the naked eye is pink..

It’s not heavy bleeding so far , just light pinkish red