With both mine I had a ever so slight very light bleed a few weeks in. I think it's when your next period is due. Everything was fine the first time round, babas fine. I'm only 11weeks now but everything's been fine since so far. Speak to your doctor if you're worried. You're under the care of your doctor's until 12 weeks (I think, could be 16weeks) then it changes to care of the midwives/hospital.
I had a little bit of bleeding in my early pregnancy but to be safe always refer to your health care provider!