Atrasado ônibus Ônibus atrasado

Hoje é terça feira terça-feira  e foi um dia interessante. Meu ônibus estava atrasado então eu tive que andar 2 milhas para a até à estação de trem. Eu estava muito cansado cansada depois de andar.

Comments:

1) Atrasado ônibus: it's not really a mistake, but in this case it's better write the adjective "atrasado" after the noun "ônibus";

2) terça feira: In Brazilian Portuguese, all the weekdays got an hyphen, e.g. Monday = segunda-feira

3) para a: The verb "andar" with the meaning of to go somewhere requests the adverb até. Furthermore, In Brazilian Portuguese there is a phenomenon called "crase". It's when the preposition "a" and the article "a" are written together to became "à". There're a bunch of grammar rules to use it. Even natives like me got mistakes when using "crase" hahaha.

4) cansado: In Brazilian Portuguese some words are diversified in masculine and feminine. In this case, 

                      Eu estava muito cansado = I was very tired (MASCULINE)

                      Eu estava muito cansada = I was very tired (FEMININE)

You got some minor mistakes and your text is fully understandable. I would say any native speaker could read it and comprehend it without any effort. 

I hope I could help you,

Victor.