5w4d brown spotting...

Katie
Last night I went pee, wiped, and noticed that there was brown tint.  Pee'd again at like 5am, there was nothing, and now there is brown tint again...small amount, and thin.  Is this normal?? Or should I be worried.  I don't have any cramping.  I did have a chemical pregnancy towards the end of June, so I'm a little paranoid.