This has happened to me a few times over the past few weeks. Baby is fine and growing 3 of the 6 OB's in my practice say it just happens. Can not find an active bleed and it is not coming from my ute or cervix.
Don't worry too much, but it was def a good idea to call and let them know.
vermont7:I have had spotting on and off the last few weeks too. Usually brown and sometimes pink. I had spotting and red bleeding all throughout my first pregnancy and while they never really could explain why it was happening, my daughter was perfectly healthy and full term.
This is reassuring for me personally. I bled like a period off and on yesterday, and today is just light spotting. Going to test my HCG levels Friday and compare to yesterday, but we're thinking it's nothing. I get crampy off and on, but I have been this whole time. Feels like gas or a tummy ache anyways! lol
On Topic!: Basically, don't worry about it, but I would keep an eye on it and it's good you contacted someone. If it continues I believe they can do a U/S and/or blood work. Keep us posted, but I'm sure it's nothing.