Is the Martini and Rossi drink that weak?

Burner account for this one because it’s a little embarrassing. So I’m from the US and I just turned 21 a couple of weeks ago and I’m currently on vacation in Cairo. A few days ago I had my first alcoholic drink which was an amaretto and I of course felt sick for the next 24 hours. I couple of hours ago I had my first Martini and Rossi and I feel nothing, could the bartender have purposely served me something non-alcoholic bc I look young and obviously don’t have that much experience drinking alcohol? It actually tasted how it was described online and looks the same too.