Oi. Desculpe o atraso para entrar em contato já que essa semana foi meio corrida, mas está tranqüilo agora! E você? Como passou essa semana? Um enorme para pra você!
Remarks about the translation
Original request: OI forgives the delay for entering in contact therefore this week was half race, more tá tranquilo now! E vc as it passed this week!!!!!!!!! an enormous kiss pra you!
It's a good use of English...one thing might make it even better and that would be if you could take "but it is all calm now" and change it slightly to "but all is calm now". Either can be used, but the last one has more recognition in English, and makes for better reading.