Pink, to brown, back to pink..

Jill • Married to an amazing man. Have a beautiful handsome baby boy. Baby #2 is on the way.
This spotting crap seriously needs to end. I know I shouldn't freak out or worry but I do. I go from single wipe pink to basically nothing ten next day brownish with basically nothing. And then today I am back to a brighter pink small amount. 
​Is this normal to go between pink and brown?? Or is this a bad sign?