That really stinks. I hope you get stateside soon so that you can have access to the kind of care that will help (neuro, opthamologist, maybe physical therapist). Is there no way to go around the captain, to get a consult with a neuro? I know it's probably frowned upon, but you have to live in your body... she doesn't.
Increasing number of aura's, worsening vision, and severe pain need to be taken seriously. Well hopefully it's something small, like just needing a new script (glasses).
Sepra for an abcess? Wow man, that must be one wicked ingrown hair.
The reason I asked whether you were male or female is because I have heard from a friend of a friend (who works for the VA), that they've been issuing boots and packs designed for men to women. Because of the difference in biomechanics, this has lead to back and hip problems in women. This obviously doesn't apply to you.
Keep pushing and hang in there!