Thank you for the advice and personal situations!
I am sure you all know how hard it is when they culture something for the first time. I guess in a weird way I was hoping Avery would be one of the 'abnormal' cf cases. That she would be the one that dodges the 'bug' bullet and will always be healthy.
We do everything we can to shield her from germs (cleaning, sanitizing, washing, sterilizing, etc), but we don't keep her in a bubble. So I was playing the blame game. Should I have cleaned her mouth out after she put those rocks in her mouth, should so and so not have touched her, should we not go to the playground, did I sanitize her toys...I could go on and on. I know I shouldn't, but it is only natural. I want to shield her from all that I can, but I am not superhuman.