I hope you feel better soon, Boomstick.
You were able to recognized your symtoms because you've been through that before. Medical training or not, if a person is experiencing kidney stones for the first time, they may not know what is going on. Even as an EMT, I would not be able to make a definitive diagnosis on myself or on a friend/partner in the woods or on the trail. What would be important is recognizing that something was wrong and needed attention, and taking action. Reading up on conitions and ailments may help give you a general idea of what is going on, but actual experiences will help you even further. That's why EMTs and nurses do clinicals, and docs do residencies.
Don't get me wrong, as I am not knocking you Boomstick. You are ahead of the curve because it sounds like you've taken an interest in first aid. I think the actual rendering care is often overlooked by most outdoors folks. People will spend countless hours assembling a ninja first aid kit, but more often than not will not spend time to take a basic FA course, or even practice bandaging or splinting techniques. Other folks don't even bother, which is scarier yet. I have two friends that I occasionally camp with, and neither one of them bothers with any FA stuff.
Another good point that can be taken away from Boomstick's post is to know enough to turn back if you feel ill. I remember a story here not too long ago about an Eagle Scout who twisted an ankle, and instead of turning back, kept going and ended up getting lost, and ultimately had to be rescued.