you shouldnt be worried unless you pass clots, it gets very heavy, or it turns to bright red, i know its very hard (trust me i kno) so you will probably worry anyways until you get the ok, im not even spotting and still am worried out of my mind until i get the ok, but if you scroll down you will see tons of people with stories just like yours, its common to spot in pregnancy, good luck!
thanks. Its just so hard not to be worried. any little cramp that I get I get so paranoid.
I have been pregnant and delivered 3 beautiful healthy babies and I had this all three times around 15-16 weeks. I even had some heavy bleeding with my first two but after a tip to the E.R and a few days of bed rest every thing was fine so I would give your Dr. a quick call but Im sure every thing is fine. Good Luck!