Bleeding at the implantation site can occur as the placenta forms. It is called a subchorionic haematoma. It is not ideal to insert your finger into the vagine - it is self cleaning and will expel any residual blood without assistance. The cervix does change with pregnancy so it is difficult to know what is normal and what isn't but the main thing is the baby is continuing to grow.

Some women do have bleeding through pregnancy. I have a subchorionic haematoma and had bleeding at 10, 11 and 12 weeks. Mostly a small amunt but still scary. I haven't had bleeding since that time but other women continue to bleed throughout their pregnancies.

What you are looking for is increased bleeding - heavier than a normal period, cramping and clots. If none of those are happening, try to rest and relax until you see you OB.

Good luck.