Am I sick because of too much caffeine?

Okay so about 7 hours ago I went to Dutch Bros and had The Kicker ( 3 Bean Espresso Roast, Irish Cream, and Kick Me Mix). I drank it within 10-15 minutes, and it was a large. I felt a little off but generally fine after. Then around 2 hours later I became very restless. That wore off after about an hour and now I just feel very dizzy, nauseous, and have diarrhea. Is this a caffeine overload or something else?