Belly button question??

KaY • going to be a mummy to my boy Levi😘
Im currently 13 weeks 4 days and for the past 2 days I've had stretch feeling on my belly near the belly button.. last night as i undressed for bed i noticed blood on my belly button. It's been bleeding over night amd still have them stretchy feelings.. is this normal?? I rang midwife and she said it's not gona harm the baby but for me to jump in the bath and bathe it.. im worried why it's bleeding?? Anyone had this.???