/lit/ - Literature

I've lived in the US during one year and took a Creativing Writing Workshop class in the university I was attending there.
The problem is: Although I can communicate well enough for daily things, my english for writing literature was crappy.
So, in order to get more used to it, I started reading a lot of books written in English. While I certainly had improved, after one year doing this I'm back to my country and I want to write in the language I'm good at (or at least better).

Problem is: every time I try to write, I just think in english. So it seems like I'm blocked and cannot think on my own language when I want to write.

Has anyone here ever experienced a similar situation?
Any tips?