Wanderlust90,
Your description sounded very close to how I would describe depersonalization, though it can be many things. As Betty_B mentioned, it might be a good idea to speak to providers about it, if it is a result of medication reaction. Pay attention to when/if it happens again. And then when it does happen, do your best to remember it will pass. Sometimes if I am experiencing depersonalization and I starting thinking too much about how weird it feels, it is like it amplifies!
Hope it is a temporary and one time thing for you.
FearLess47