My baby fell! 😭

I feel so bad. She's 3 months I never imagined I could feel this bad I was trying to put the car seat in the stroller when I just see my baby on the stores parking lot took her to the doctor immediately and he said she's ok I still feel so horrible. She had cried when we go to the store so I carried her then put her down on the car seat I was planning on putting the straps on when I had finished putting the car seat but  it was a very bad idea. Please help me feel better. I really didn't mean it to get this far.Â