Dark Brown vaginal discharge, is this normal?

A few days ago I had a small amount of spotting and just today I had very dark brown vagina discharge (like a poo colour). I’ve had more cramping recently and just want some advice of what might be going on…. The past week or so I’ve been talking to my fiance that I might be pregnant, we will be going to the doctors soon but we are just waiting to see if I miss my period ... I’ve taken a couple of pregnancy tests but I think it was too early since they came out negative… so I’m just giving it some more time… any advice is appreciated :)

ps: I’ve just started bleeding and cramping too…