I'm sure i had this once or twice, my GP told me to call back if it got heavier, darker or redder but it just stopped so i didn't. BUT i'd recently been swabbed for infections and they knew i was clear of BV etc. so if you haven't you might want to see your doc just to make sure it's nothing.

I know of a woman who has bright GREEN discharge when PG. Her first pregnancy she was going nuts back and forth to the docs for months while they tested for every thing they could think of. THe day after delivery it was gone and 2 years later it was that which let her know #2 was on the way... Our bodies do such weird things sometimes....