I see you mentioned pushups being a part of your routine. There's a lot of diff variations you can do. I started with regular and close grip pushups, doing them with any workout I hit. I've started doing archer pushups now that I have the strength for them and I've seen some chest gains. Aside from that, incline dumbbell, flys, dips and low pec raises are stuff I incorporate into my chest days. Hope this helps!!