Azesty: Good to hear your trip is going well overall in spite of some physical hiccups. I believe you use a Brooks B-17 based on your packing list from earlier this year. Is the leather still a little slippery? Brooks saddles can be tricky to set up right. You may be unconsciouly sliding forward on your saddle which might be putting too much pressure on your hands. A way to test this is to ride on the hoods (upper portion on your trekking bars) and try to remove both hands off the handlebar a little. If you feel your body moving/sliding forward on the saddle as you do this, it means that you are imbalanced. Try to raise the tip of the saddle until you feel completely balanced (being able to lift your hands without sliding forward) and without causing any discomfort to your private area (it's a fine line!) Play also with raising the handlebar a little. Between raising the tip of the saddle and the handlebar, you should be able to find comfort for long distance riding. If you think you've caused some injury (too much pain) do rest from riding for a while.

Getting professional fitting I'm sure is out of the question given where you are in the world.

If you find a solution to your pain, please report back. I'm sure it will help others.