Remember, you get bigger during recovery, which means rest. Working out stresses the muscles, and builds neural efficiency to some extent. repairing the muscles is what packs on the size, and you need to rest to do that.
to pack on muscle, focus on a good routine, good rest, and eating enough. 3x/wk is plenty if you got your routine down.
What are your stats? age/height/weight/bf
What are your current lifts? bench/squat to parallel or lower, DL, OHP