I've been there. I'd just watch her. If she isn't vomiting, her eyes look fine, she seems totally normal, she's most likely fine. I've called our nurse line (for our health insurance) before and gone over things to look for with a concussion, and was told that just falling down rarely causes one. You could call yours (if you have one) and talk it over if you are really worried.
Something that works great for bruise reduction is a homeopathic remedy called Arnica cream. I swear by it, it is amazing how fast it can heal a bump or bruise. I've purchased it at Whole Foods or other natural foods stores in there pharmacy type isle.