RE: Boost for chest?
if you are training 5x5 then leave the routine as is. Are you working at the heaviest weight you can manage 5x initial reps at? If not then increase the weight until you are. If you are working at your optimum weight then your sets should look something like this - 5 reps, 4 reps, 3 reps, 2 reps, 2 reps. As you get stronger then you will be doing 5, 5, 5, 4, 4. When you hit this point then it's time to increase the weight. Also are you eating enough food. Your body needs a significant calorie surplus to grow as well as plenty of rest. It all takes time.