Question about bleeding/spotting during first month of pregnancy?

I'm in my first month of my third pregnancy, and this is freaking me out. In my first two pregnancies, I do not recall having had bleeding or spotting, but I know that it is considered "normal." Now, I am, and I am wondering just how MUCH is considered normal. It started last night, and has steadily remained like the beginning of a period, only usually if I have that kind of bleeding or spotting at night right before a period, I have a full-on, HEAVY period the next morning. Now it's like pink discharge, or reddish streaks, not heavy, but still enough to freak me out some. HELP! Is this considered "normal" or should I be worried?