Clamping and the dorsal nerve

I have been clamping and the only fear is that I feel almost like a slight pinch along the top of my penis. I am scared that somehow the clamp is putting too much pressure on my dorsal nerve. Any input?

should be mr 7 inch updated girth 4 7/8 7.25 BPEL 4.75 girth Penis to Height Ratio: 1:8.96

5 1/8 girth 9/21/11