I walked the
Camino Frances and Camino Invierno alone last spring. I had some days with other men and women walkers, and lots of day by myself--literally by myself, with no other walkers in sight for hours (especially on the Invierno, which goes through rural Galicia.) I felt unsettled occasionally by the situation of being alone in an isolated area--but never afraid of a specific person. I had wonderful experiences walking alone, both internal and social, that I would not have had if I had traveled with a friend or family member.
The advice to "keep others in sight or join others" that the OP is being given by some here is not always workable--or welcome--on the Camino. You will be on stretches where no one will be in sight. If you have it in your head that this is a dangerous situation, it could spoil your walk. Try to think of being alone-- alone in nature--as normal, rather than a situation to be avoided.
My conclusion after walking the Camino was that it's a mental as much as a physical experience and test. Those that I saw having trouble were often younger folks who became upset over social situations, who went too fast to keep up with new friends, or who panicked over blisters or a bad cold. A five hundred mile walk is a "head game" as much as a trial for your feet.
Women are fed a steady diet of being the victim. Our heads are full of images--largely invented--of women murdered, assaulted, kidnapped and abused. These images end up isolating us, keeping us in "safe" situations, and afraid of exploring the world without a protector. We give up so much of our power because of this irrational fear. And fear is such a painful emotion to feel.
So go and have a blast! I felt liberated walking alone on the Camino, and I bet you do, too.