it's possible for a child to have a different blood group from parents in certain conditions. If parents have AB and O blood groups. Now the ABO Blood group reveals that we can have several options. So one is either blood group A, B, AB, or O. So blood group AB can give A or B which is different from AB.

Blood in the stools is NOT NORMAL. It could be due to Dysentery or bleeding along the gastrointestinal tract. Blood like substance does not necessarily mean that there is blood in the stools. Kindly see a doctor and let the stools be analyzed in the laboratory. If confirmed to be blood the underlying cause of the bloody stools will be further investigated and treated.

Blood in the stools is NOT NORMAL. It could be due to Dysentery or bleeding along the gastrointestinal tract. Blood like substance does not necessarily mean that there is blood in the stools. Kindly see a doctor and let the stools be analysed in the laboratory. If confirmed to be blood the underlying cause of the bloody stools will be further investigated and treated.

Was it through CS or normal delivery?

It may be as a result of Nasal congestion or respiratory infections. You may experience bleeding when blowing your nose because of nasal congestion or a respiratory infection. Frequent blowing of the nose may create broken blood vessels. This can also occur if you sneeze or cough frequently, such as when you have a respiratory condition

Hope it will not be harmful to me or my baby

It can be up to a year before you have a period, as long as you're breastfeeding round the clock but If you bottle feed your baby or combine bottle feeding with breastfeeding, your first period could start as soon as 5 to 6 weeks after you give birth
So you could be fertile again just three weeks after having your baby.