As Deano explained, the Pectoralis major is one muscle. Under the pec major, their lies an elaborate makeup of external intercostal muscles and the Pectoralis minor,as well as the anterior Deltoid. Basically you are dealing with a network of muscles that are all involved in growth...which takes time. Unless you have been training for 12+ years it sounds to me that you need a base...which means proper diet, sleep, proper form when doing exercises...ect. After all this is accomplished...total pec development will be had...Oh and that means working the triceps...atagonist muscles in the back...deltoids...and even biceps...oh and to have the chest you want...working the legs is needed for core support...What I am saying is...it takes more than just the Pecs...to get the desired look. Try Beans workout...change is a good thing..that means change the rest of the body as well...Goodluck!