Testosterone of 5 and severe sleep apnea?

A friend has severe sleep apnea and uses a Cpap machine to manage it. He also has a testosterone level of 5. He has been as low a 3. He some testosterone replacement left but is running out so went to a doctor to get some more who refused to give him any until they find the cause of the low testosterone. I thought sleep apnia caused it - it was obvious. Now he is desperate. I advised him to come up where I am that is a much bigger city then where he lives and get a though going over by some specialists. But he has no idea what to do in the meantime - they simply will not prescribe any more testosterone and he remembers how he nearly committed suicide when he was at 3 he felt that lousy. Any idea o what he can do util he gets a work-over by specialists. Personally I think its obvious - the sleep apnia but I am not a doctor. I looked it up and 5 is pretty low - but 3 is really low - surely a competent doctor will not let it get that low again even if they haven't exactly determined the cause.