I can see why you would feel anxious/nervous/fearful because you didn't practice and it's been a while since you used what you learned...yet, I too believe it will come back to you.
There was a similar experience I had when I learned sign language and also with another language I became fluent in.
I didn't use either for quite a while (I freaked and thought I had forgotten everything), but as soon as I started to use them again...it all began flooding back to me.
I really hope this all works out for you and that you also might have someone who could help you out so you aren't feeling so wretched.
Good Luck with everything .