Hi Catherine i had the same thing, but mine was a tiny tiny amount only when i wiped their was a slight streak of brown blood, it happened between 51/2 and 71/2 weeks, my Dr said it was quite normal but because i am a worry wort he booked me in for an ultrasound at 7 weeks and it came up fine they just found the smallest amount of blood below the sac, so tiny it was a hairline, the sonographer that it could of happened when the baby burrowed into the uterus and sure enough 1 week later it completely stopped and my obs said that i was 95% going to have this this baby now i am 11 weeks and feeling great except for morning sickness. I am sure everything will be ok but do keep an eye on it!! Roslyn