I've been thinking about this for a very long time, it's for more than six months, trying to figure out why the words just aren't coming when I start speaking. 

Firstly, I was thinking thought that the writing is was not enough coherently coherent enough, so my mind is was still struggling when it comes came to any form of talking in English.(1) And I was right. So I've started to read books only in English.

The second thought was that I didn't hadn't listened to a lot of speeches in English. Well, I think that this was the most useful important(2) thought about my problem. I started listening to English music (even if though my music preferences doesn't don't include too much speech(3)), I've watched movies more frequently using only English subtitles. I have even tried to listen to some English podcasts and conferences.

Editor Notes:

(1) Since you are talking about how you started thinking about the problem, you have to change the sentences into past tense. The weird differences in words depending tense is a pain, I know, but you'll get it, I know it.

(2) "Useful" can technically be used correctly here, but "important" is a better word to explain what you're talking about.

(3) "Don't include too much speech" is technically correct, but it can be changed to "don't really have lyrics" or "don't have too many lyrics" to sound more fluent.

The discrepancy between writing and speaking

I've been thinking about this for a very long time, it's I've spent more than six months trying to figure out why the words just aren't coming when I start speaking.

Firstly, I was thinking that the my writing is not coherent enough, coherently so my mind is still struggling when it comes to any form of talking in English. And I was right. So I've started to read books only in English.

The My second thought was that I didn't hadn't listened to a lot of speeches in English. Well, I think that this was the most useful thought about my problem. I started listening to English music (even if my music preferences doesn't don't include too much speech), and I've watched movies more frequently using only English subtitles. I even tried to listen to some English podcasts and conferences.

The discrepancy between writing and speaking

I've been thinking about this for a very long time, it's more than six months that I have been trying to figure out why the words just aren't coming when I start speaking.

Firstly, I was thinking that the writing is not enough coherently sufficiently coherent/coherent enough , so my mind is still struggling when it comes to any form of talking in English. And I was right. So I've started to read books written entirely only in English.

The second thought was that I didn't haven't listened to a lot of/many speeches in English/recordings of English speech/much spoken English. ('much spoken English' is a far better way of expressing it) Well, I think that this was the most useful thought about my problem. I started listening to English music (even if my music preferences doesn't include too much vocal music speech), I've watched movies more frequently using only English subtitles only, and even tried to listen to some English podcasts and conferences. (try TED.COM talks)

The discrepancy between writing and speaking

I've been thinking about this for a very long time, it's been more than six months since I´ve been trying to figure out why the words aren't just coming out when I start speaking.

Firstly, I was thinking that the writing is not coherent enough so my mind is still struggling when it comes to any form of talking in English. And I was right. So I've started to read books only in English.

The second thought was that I didn't listened enough a lot of speeches in English. Well, I think that this was the most useful thought about my problem. I started listening to english music(even if my music preferences doesn't don't include too much speech), I've watched movies more frequently using english only subtitles. even tried to listen to some english podcasts and conferences.