Overcoming language anxiety

So I've been learning Japanese for 1.5 years now, and I would say I'm upper beginner, lower intermediate in terms of skill. I do plenty of reading and plenty of listening mostly with anime, manga, and YT and have about 2.5k words learned in Anki.

So I should've been fine when a girl asked me "LINEできた?" But that's when tragedy struck. My mind was completely empty. I heard the individual words that she said, but for some reason, I just couldn't piece them together. Basically, I got cooked.

I should've known this. If I were reading this, I would've gotten it instantly. But what happened?

Granted, I don't talk with anyone in Japanese at all in my studies (mostly just to myself), so maybe that was the case?

So my question is, what is my issue here? Is there something I can do to help this? Or is the answer just immerse more lol.

Thanks very much! 🙂

by Straight_Theory_8928