Now how I solved that problem. (need to write a discussion about it... so I just could give a link each time I want to share the story).
Some week I was typing so much and so quick - without even bothering
about mistakes and...well, sometimes to read my friend's answer - that I started
forgetting "how to say that in Russian" and started to HATE English (or
felt nausea at least, absolutely).
It was a very interesting
conversation, it consumed me entirely and I was typing in a chat really
quickly many hours a day for a few days. Then I opened news in youtube (highly uncommon thing for me),
paused it, feel asleep.
Youtube page refreshed, and in the morning I
dreamt that someone is speaking English and i understand everything.
I woke up... someone (PC) indeed was speaking. Then I realized that I indeed understand everything.
I can think of one explanation and it si much about 'how to say that in Russian?'. I think, English was uploaded to 'quick access memory' (and Russian partly removed from there). When I heard a combination of sounds (note that my passive vocabulary was huge) my mind was searching for a match. And normally the guy could say 2 more words before I come up with a guess. Now searching was 100 times faster. I could hear a word that I'd always imagined pronounced differently - and see my mistake immediately, without thinking:)
Interestingly, if that time it was effortless and I felt like I understand 100% of what is said (as if I was reading) and it continued for a few days or two weeks may be - 2 month later I tried the same channel again... And there was difference. Now I had to concentrate and it was not 100%. But almost so.