Santiago, fear and joy

Today I had a pretty awful migraine. I have no idea where it came from, but it sure put me down for the day.
I started to feel the headache coming just before lunch, and then felt nauseous, so badly that I had to go to bed before the end of the meal.
I mostly spent my afternoon sleeping, waking up every time with my head thumping, and if I was brave enough to get up I was sure to have the nausea hurrying back after a few minutes.
It is only starting now to be better, so I could eat almost normally tonight, but I feel exhausted. Strange, after all the time I spent sleeping today!!
I wonder if somehow that migraine isn't a sign of some apprehension or fear in front of what I am about to start, i.e. the long hard walk to Santiago. The 5 to 6 hours walk every day in the Spanish heat, the worry about my shoes (are they not too old to manage 800km? I can already see the soles are worn, will they manage the distance?), being alone on the path, being in Spain where I barely speak the language, not knowing how things work there, will the bag not be too heavy (but then if I remove things from it now will I not miss them?). Yes, I can feel all these worries at the bottom of my mind, churning in me even when I am not aware of them.
I can also feel the excitement, the longing of my soul for the adventure, the freedom, the new people to meet and new landscapes to discover. And mostly the excitement of discovering myself throughout it all.