help please, I still need a answer

Asia

hey yall, i need some help okay so on the 23 of july me and my husband had sex and i had creamy discharge now on the 4th of august i took a bath that night around 12 ish and when i took my panties off i seen brown spots in my underwear so after my shower I immediately looked up what does brown discharge mean and it keeps saying that it could be implantation spotting I've been spotting light brown since the 4th and I still am!!! so I took a hcg test August 5 and the test came back negative and I did not have my period yet and now I dont know what to do I just want to know what is going on with me