does caffeine cause anxiety?

i have been drinking coffee – 1 cup a day – for over 3 years. lately, however, i think it makes me feel anxious, not when I drink it, but about 5 hours later. i am resisting drinking more to calm it down, because this seems like a bad solution. also, please don’t tell me just to stop drinking it and find out—i know that’s one way to do it.