Implatation or Period?

My period was supposed to start Feb.24th. On Feb.26th- I noticed light brown blood for 2 days when I wiped . Then it turned into light pinkish-red color on Feb.28th and its still like that when I wipe. Doesn't seem like a period at all and if it is...its not my usual periods. (Heavier for the first 2 days than gets lighter). It is very light and I took a ClearBlue digital pregnancy test this morning Mar.2nd and it was negative. I completely opened the actual test and lookrd on the strip there was a very very faint second line.

Just wondering if this could be implantation bleeding and if anyone else experienced the same thing and is/was pregnant?