Girls, has anyone experienced this and what does it mean??? I'm 6 week…

Girls, has anyone experienced this and what does it mean??? I'm 6 weeks pregnant, there was bleeding this morning. The ambulance/paramedics said... they did an ultrasound and found a hematoma — what does that mean? Does it affect anything? They say the baby wasn't harmed, the heartbeat is present. Everything is fine with it, the hematoma will be reabsorbed. Where did it come from and does it affect the baby?