Everything’s going wrong

Wednesday is the day I was supposed to see my baby for the first time on US. I’m 8+4 today with my rainbow baby but I woke up at 4:30 this morning to some bleeding and cramps. Cramps were gone after a bath and I was back asleep by 6 but I’m still slightly bleeding. Am I miscarrying? I didnt lose a lot of blood barely enough for a panty liner to be needed. And it was mostly pink not red. I fell really hard on my back a few days ago, could I have hurt the baby when I fell? Any help would be perfect and much needed. I’m probably just over a sensitive and freaking myself out