Unexplained feeling

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So it was my first day in my new school here in Ireland. Note, I've decided to live here from then (again) and I came here last week, with no background of the highschool life of the Irish. It was all grand, I've had two classmates who showed me around and helped me with things, especially in finding my subject rooms (lol school's so big I'm gunna get lost anytime especially on a first day, and the map didn't help much), got nice teachers and I perfectly understood their accents and terms. But in the afternoon I felt really bad and I got instantly depressed (if thats the right term). It's still ongoing while I'm typing this. I'd probably say it's because I'm worried about the German and French, because I'm heavily having a hard time with it, as the discussions are already advanced, and I never had any background of either back in the Philippines (since there's no really options of subjects there for highschool and languages aren't being offered). My German teacher understood my case and said she'd try to help me with extra classes along with my other classmate who's new to it as well, and provide us with booklets of the basics. French I don't know, I haven't really talked to my teacher personally just yet, but I might bring up the matter. I don't know if it's just that or there's something else that contributes to this feeling. I'm worried now about not leaving the school alive x.x Thoughts?