Is this normal? When my DS (21 months) is quite upset and crying a lot, a little trickle of blood from his nose mixes in with all the snot and makes it bloody. Not a lot of blood, just enough to make pink snot. He doesn't have nosebleeds any other time, just when he's REALLY upset (about once a week). Most crying situations (several times a day) and he's fine. Should I be worried? Thanks.