Drop the weight, use a spotter, and try benching to the neck with a wide grip. Bring the bar down until you feel the stretch in your upper pecs, then squeeze with your pecs to lift the bar. You should be feeling that in the right places, namely the upper chest, and very likely soreness running up and down both sides of your sternum if you do enough volume.
I’m not going to say “this is what you should do”. I’m just suggesting to give it a try and consider this as an option.