I just don’t know anymore...

To try and keep this short and sweet... I had to take a pill to help my non viable pregnancy pass on December 28th. I had positive pregnancy test until about 4 weeks after miscarriage then finally a negative. I spotted pink on Monday and kinda on Tuesday now today it’s brown... I took a test and it looks negative but then again like there might be a very very very faint line. I’m so confused... what do ya’ll think is going on and do you see anything or is it just my eyes playing tricks on me :-/