My penis feels slightly harder after cystoscopy and I can sorta feel the urethra when I press on the penis more then I could before, is this normal?

Can happen. Penile distention results from increase in blood in the shaft. This occurs when drugs like Viagra (sildenafil) taken or some minor clotting in venous outflow of the penis happens. After cystoscopy a certain low level of venous blockage will occur which is temporary.