Dreaming in another language?

I have had a lot of trouble sleeping lately, (aka I don't really at all) however when I do sleep I have been dreaming in Spanish. Completely in Spanish, even my thoughts, every person who speaks, and even physical writing. And when I wake up, I still want to speak Spanish and I find it hard to think of words in English for a few minutes, almost like aphasia but only for English, I have no problem forming words in Spanish, and only for a few minutes after I wake up, then English slowly comes back over the next 20 or so minutes. Is that weird? Like I do well in my Spanish classes, and I feel I am a strong speaker for where I am at in my Spanish education, which is second-year (intermediate) college Spanish, but obviously, it doesn't come as natural as English does so it's weird that I would dream in Spanish and have trouble speaking English...

Anyone know anything about this? Is it sleep deprivation? Am I going crazy? has this happened to anyone else?

Any insight would be greatly appreciated.
Dreaming in another language?
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