Simone ,
I too think next time you should go straight to the hospital - On here we all can suggest things , but at the end of the day nothing is better than a professionals opinion , a professional who has seen your child and analysed her condition..
If there is no way of getting to the hospital - I'd call an ambulance , rather safe than sorry..

Having said that , I hope your little girl gets better soon !..
and you get some rest ! Raising kids isnt easy , let alone 3 little sick ones