Breaking out after getting to college

I’ve been at my college for one week and I’ve never had skin problems before. I’m 19 and I’ve always washed my face twice a day, I don’t wear makeup very often, i moisturize, my skin has always been fine. Maybe not perfect but I definitely have had it better than some people I grew up with. Anyways, I’ve been at my campus for only a week and so far I’ve gotten a large pimple and tiny breakouts all over my nose. My skin just looks super dull and I don’t know what to do. I’m guessing maybe it needs to get used to the water here? Since I went west coast to east coast? I really don’t know what else it could be.