Baby fell inside shower

Super worried! My toddler fell inside shower. She fell on her back completely on her head. What should I do freaking out!!! She cried for while afterwards. I felt her head and she has a bit of swollen side with a small lump..this lump could’ve been there before. Not sure. she is walking and is clumsy than before today she has fallen a lot and catches herself with her hands. The thing is am I over analyzing now? Is this normal for kids to fall a lot?