Yes, it is generally normal for period blood to appear dark brown or nearly black. This usually happens when blood takes longer to exit the uterus, causing it to oxidize and change color. It is most common at the beginning or end of a menstrual cycle.
Yes, it is very common for infants to sound congested. Because their nasal passages are small and they cannot blow their own noses, a small amount of mucus or naturally narrow airways can create a rattling or whistling sound, even when the baby is healthy and not sick.
No, it is not considered normal to have blood in your urine. While it can be caused by something minor, such as a urinary tract infection or strenuous exercise, it can also indicate a more serious health issue. You should contact a healthcare professional for an evaluation.