Ok i've been working out for like 3 months now and it honestly doesn't look like my arms have grown at all. When i flex they look a little bit bigger but not much. And when they aren't flexed my arms look as skinny as they always have. But my question is this, should i just stick to compound exercises like pull ups and cable rows and bench press even though i don't feel a burn in my arms as much as when i do some isolation exercises for them? I want to make sure i'm not overworking my arms and not underworking them.