My son did not know how to break a fall with hands - he tended to just tip over front ways once he was walking (this is flat footed WITH orthorpeadic shoes). It feels like he spent from about 15 months to 2 1/2 yes old with a bruise on forehead. Did the ER thing once - he was fine - did the Drs office many time - he was fine. I panicked each and every time. Now, I tease him about it - seems he inheirited my lack of coordination. Poor kid.
Long way around the bushes to say - he is now 15 and perfectly normal - no effects from the constant bumps to the head. Hmmm, unless I can blame the teen age mood swings on it? Nah.
They are more resilient than we give them credit for. And, as Moms, we are programmed to worry whenever they fall and go ouch.
If your daughter was up and happy a few minutes later, and doesn't show any signs of injury - and you are a Nurse so you know what those are - then try and relax and let it go. She is fine.