so what I remember is that the female MC wakes up after being pushed and smacking her head on a tree. Then she finds out she has really strong magic(destroys the training room). I don't remember if she get memories from hitting her head. that's all I remember
Based on that description, maybe Hakushaku Reijo ha Chito Tensei Mono? (which was unfortunately never finished and discontinued)
That's it, Thank you. that suck every time I remember a novel I haven't read in a long time it's abandoned.