Hi mama! First time mommy concerns are real, I totally understand. Please do call your baby's clinic or pediatrician today to check, especially dengan darah sikit, better safe than sorry, yeah? After vaccinations some babies do have loose stools, tapi the blood part needs a doctor's eyes on it, so don't worry yourself at home. A few of us mums have been there, and the clinic sorted it out quickly, so it's usually nothing major, but go get it checked lah. Keep baby hydrated and the doctor will advise from there. Rooting for your little one!