Don´t go mad, and don´t quit! Take a deep breath, and an antihistimine. Sit down with a glass of vino.
Now, tell yourself:
I have a few bug bites. They are not massively swollen or seeping bodily fluids, they are not infected or infectious. I have not contracted a terrible disease.
Insects have bitten me.
I do not know for sure what kind of insect bit me -- it could be mosquitos, could be a spider or a flea or a tick or even a bedbug. I have taken proper precautions. My things have been thoroughly washed.
No one thinks I am Typhoid Mary. I am not spreading disease.
I am not sick. I am not dying. There is not a good reason for me to quit now.
This irrational fear and loathing is costing me way too much anxiety. I cannot let this ruin my camino.
I am going to stop worrying now, and enjoy the rest of my walk.
A bug might bite me again, but I will get over it. It is only a bug bite.
I am a pilgrim. There are insects out here. They are part of the pilgrimage, just as I am.
And so I am going to sleep now, and tomorrow I will walk, and I will continue walking until I reach my goal.
Finish the vino, brush your teeth, and settle into your über-clean, bug-free sleeping bag and rest well... tomorrow you have a long walk to do!