ER visit

So I'm a FTM and I put my daughter in a small portable swing and I left her where she could watch tv since she likes to look at the bright colors. I was in the kitchen where I could watch her the whole time and I saw her kicking and smiling so I bent down to clean out the bottom cabinet and I heard her yell and cry and I immediately got up and say her face down on the floor I picked her up and checked her all over her tummy was red and so was her chin and cheeks I called the nurse hot line and they said to bring her into the ER I'm in the waiting room and terrified that they will take my baby away. I'm sorry if I sound over dramatic but I've never been in this situation. What usually happens? She's always 3 months old