Testicular cancer diagnosed

I'm a 42 year old male with no history of cancer or any high risk factors. 6 days ago I went to my primary care physician because of a very hard and somewhat sore testicle that I had noticed just a few days before. Ultrasound showed a mass in that testicle and some vague slight aberration in the other, but all blood work including those looking for specific markers, EKG, chest x-ray, TB test, and CT scans of chest, pelvis, and abdomen came back as normal. Today I had an additional ultrasound done because the hard testicle with the mass is not as hard now, less swollen, and not sore anymore. Also, the aberration in the other testicle has somewhat cleared up. My doctors still want to remove the testicle with the mass - the surgery is scheduled 5 days from now. I know they want to be on the safe side, but part of me feels that they just don't want to change the course toward surgery they are on regardless of any changes in the testicle at this point, mainly because cancer was officially stated as a possibility at the beginning and they don't want to be liable by not going ahead and removing it. If I feel in the next 4 days that the testicle feels totally normal should I request another test of some sort to see if the mass is gone and postpone or cancel the surgery? Or just go forward with the surgery regardless of the symptoms disappearing with the chance that it's totally unnecessary and the mass was just some sort of infection or something that cleared up by itself? Your thoughts? Thanks