A linguistically trying day

I need someone to give me a shoutout if they've felt what I'm feeling.

Today I had a completely idiotic day concerning Japanese. These days come every so often (and seem to be increasing in their incidents lately-- alarming!), and they most often appear on those days which I have my Japanese lessons. I don't know how to describe it. It was just one of those days where I could not seem to either communicate or understand anything that was said to me in the elusive Nihongo. You would have no idea that I've been in this country for nearly 8 months!

It really makes me want to tear my hair out. In college I considered myself quite a good language student with somewhat of a knack for languages. Apparently I am much better at studying foreign languages than second languages (the difference being that you are in your own culture for the prior and immersed in the latter). It's so frustrating. I have studied a lot, and it's in my head, but when I want it to emerge in a useful situation, something happens and the communicative effort goes awry, only to be lost in the vast sea of sentiments lost over time due to cultural barriers.

I'll get over it. It was just a linguistically trying day. Perhaps this is part of culture shock. I don't know if this is related to culture shock, too, but recently I have been reading "Brave New World" by Aldous Huxley and am fairly certain that the civilization he is speaking of is Japan. :)