8dpo, bbt dip, implantation bleeding? Help!

I am 8dpo this morning and I started spotting thin, light brown fluid. My past two pregnancies (both miscarried) had implantation bleeding as well but they were like pink first then a dark brown. I haven’t notice pink yet. Also my temperature dipped per by bbt. I took a test but got bfn which may be too early. Just curious if you had implantation bleeding (hopefully it’s that) and a temperature drop when implantation bleeding and it turned out to be pregnant. This is my first time using bbt so still learning.