1. You never stated if you wear contact lenses or not, but you were working outside, so a corneal abrasion is possible.
2. From everything you wrote in these posts eye fatigue is surely possible.
3. You were tested for glaucoma, but what was the tenometry? Did the optometrist mention anything about being borderline suspect?
4. You mentioned that you have allergies, anything severe?
5. Eye pain is serious, don't ignore it, seriously.
6. Any recent illnesses? Do You have diabetes? Do you have high blood pressure? Family history of glaucoma, macular degeneration?
7. We could go on like this forever. As others have stated, make an appointment with an opthalmologist, it's better to be safe than sorry when it comes to your vision.