My 11 yr old daughter fell of her scooter yesterday around 2 pm, she fell on concrete and landed on her bottom, she fell so hard it knocked the wind out of her, today she has been very sore, it hurts to move especially to sit, 3 hours ago she started vomiting, she has had 3 doses of 8mg zophran which hasn t helped. Her tailbone area is very red and swollen, is the vomiting contected to the fall and should I take her to ER?