Implantation bleeding Or??

Ok so here's my story I had my period a few weeks ago, it was kinda light compared to usual. After my period was finished It was regular discharge for a week then come the next week afterwards I started having brownish discharge for a few days then had regular discharge up until last Wednesday( aug 2) when the brownish discharge started again. ( now a few days before I found out my boyfriend cheated on me so I'm getting my results soon) I had brownish discharge and cramping till Sunday ( aug 6th) where it suddenly changes to light pink with speckles of blood. Took a pregnancy test on August 4th and it was negative but still having this light pink mucous discharge. I will test again soon, but looking for advice as to what this is? Did I test too early?