Hello Healthnut,
You are doing the right thing, and that is to "listen" to your body.
I'm glad you have seen a doctor about this and had an MRI. HOWEVER, your doc doesn't seem to be interested/helping you.
Next step - Healthnut, look for the best neurologist/spinal surgeon that you can find in your area. Talk to those you know. Find out which spine specialist they thought highly of and and the ones they did not like. If there is a professional sports team in your area, call their office and find out the name of the spinal specialist that they use for their players.
Then call the doctor that is at the top of your list and make an appointment. Take your MRIs along with you when you meet with the doctor. Next, call the 2nd neurologist/spinal surgeon on your list and make an appointment to see that doctor too. Second and third opinions are always a good idea in my opinion.
I am not a doctor, but when you mentioned about the pain going down your left side of yhour butt and your leg, that sounds to me like a pinched nerve, and that issue needs attention without delay. And the pain in your penis also needs attention. Just as you suspect both pains may be related. That does not necessarily mean surgery. I had that same pain going down my leg and my pain management doctor has taken care of the problem.
I wish you the best, and DO see a neurologist/spinal surgeon or two.
RichT
