Brown sticky discharge- miscarriage??

I'm currently getting into 7wks. 2wks ago I had red bleeding and went to o&g to scan, doc could see the sac and yoke and everything was OK. Doc says it's just old blood and gave me also progesterone to take 3x a day. Brown spotting stopped for a week then started again a little bit. Today I got this when I wipe, first time I see this. I have no cramps, just moments of side pangs in the abdomen, aching in my leg at night a few times, and headaches. And I also lost the sensitivite breasts 2 weeks ago which is the only pregnancy symptom I had. What does this mean? Is this potentially the start of a miscarriage or is this normal...?? #firsttimemom