A small amount of malaise, drowsiness, arm tenderness, and subclinical fever are expected after any vaccine. It's most probable that you did have symptoms but didn't notice them because you're a normal, active person with other things to think about.
But having zero symptoms, if that was the case, is unusual. It'd be interesting to have your blood tested for antibodies.
But having zero symptoms, if that was the case, is unusual. It'd be interesting to have your blood tested for antibodies.