Danapoint, My tumor was found accidentally during an unrelated MRI. When the neurosurgeon told me and my wife one symptom was low libido it was like a revelation. We both felt there was an explanation for the abnormal years my libido was low. I hope this idea helps. If this is not it, then at least it has been eliminated.
So sorry you have to suffer what you are. For me, intimacy is vital. Too bad it is now missing in my life. Keep us posted on how the exam turns out (if you do not mind).