dude, there are other parts to the body besides chest...did you know that?
also I doubt that working chest 3 times has an benefit over twice per week. You should read up on hypertropy and rest
I'm trying to work my weak points right now. Chest is the worst, I hit it every Monday, Wednesday, and Friday. Shoulders are my second weak point, I hit them every Tuesday and Thursday. I hit triceps and legs on Saturday and back on Sunday. I have 19 inch arms already at 10% BF, but my chest doesn't look thick and my shoulders aren't so thick and wide. I've been doing this for a couple months now and I have been able to increase my strength like 10 lbs. of weight every week and a half to two weeks.
My chest workouts are hardcore. I'll start out doing 4 sets with the heaviest weight I can do for 8 reps. I'll take like a 5 minutes break and then do another 4 sets for 10 reps with minus 10 pounds from the previous 4 sets and so on. I'll end up doing 12 sets each for incline, flat, and decline. After bench work I'll do 4 sets of 10 with dumbbell flyes flat, incline, and decline. 48 sets in all 3 times a week for chest. I've never followed bodybuilding until recently, but I just lift and get stronger.
Honeslty, I don't know what my problem is. I've been getting 1.5 grams of protein per bodyweight a day and I've tried doing less sets and more rest days but that still didn't seem to work. I'm not big, but I'm pretty strong. I just want to add size now, but my body doesn't seem to respond.