Danas

It's not all clear what you meant to say.

Danas sam išla u školu (Today I was going to the school). Ispočetka se ništa nije dogodilo (at first nothing happened), ali dok sam išla doma (but while I was going to the school), padao je pljusak (it was downpour (downpour was falling)), tako jak da sam imala vrtoglavicu (so strong that I felt dizziness). Uniforma mi je bila sva mokra (my uniform was wet)! Danas sam plakala jednom (today I've been crying once).

Danas, idem na u školu. u početku, ništa se nije dogodilo. ali, doke je doma iz školu.
pljusak zajapuren sve mene tako da moj glava vrtoglavica. uniforma sve mokar! ali danas plakala jednom!

Danas

Danas, idem na u školu. u početku Ispočetka se , ništa se nije dogodilo, ali . ali, dok sam se vraćala e je doma iz škole, padao je tako jak pljusak da sam imala vrtoglavicu.  u.
pljusak zajapuren sve mene tako da moj glava vrtoglavica. u Uniforma mi je bila skroz sve mokra! ar! ali d Danas sam plakala još jednom jednom (We would simply say: Danas sam opet plakala - Today I cried again) !

I understood your story 100% . I'm so sorry if it happened to you. I hope everything is totaly ok now and you can be safe when you go to school or you come back from school without that horrible feeling of dizziness. 

If you need Croatain classes, feel free to book a class with me right here: http://www.italki.com/course/35270

Keep practicing.