Your serum iron and TSAT are both low even though your haemoglobin looks normal, so this points toward iron deficiency without anaemia rather than a hair or stress problem alone. Your
CRP of 17 shows ongoing inflammation, and that can make
ferritin read higher than your true iron stores actually are. Your
vitamin D and
B12 sit on the low side too, which fits the fatigue and brain fog.
Next Steps
Oral iron is usually tried first, with an infusion kept for when oral isn't tolerated or levels run quite low, so that choice is best made by your physician once they see your full picture. It's also worth asking what's driving the ongoing inflammation your
CRP is showing.
Health Tips
Please consult your physician or a haematologist about this full panel before starting any new supplement, especially before your work trip.