Taking too much is normal especially your first time out. But here are two pointers that have helped me over five Caminos:
1. Study and think about what you will be doing...walking with a rucksack out in the country. You will be on developed paths, not bushwhacking. The point here is to brainstorm, think, and game in your head likely boo-boo scenarios, what you are most likely to need. Take only that.
In my view and in my custom kit, I take band-aids (plasters), antiseptic cream, small gauze pads (2' x 2"), tape, tweezers, and a pair of blue surgical gloves... that's it. Everything else I can procure along the way.
For medications, I take acetaminophen (Tylenol / Paracetamol), ibuprofen, aspirin (heart issues), loperamide (Imodium), an antacid, and a antihistamine to reduce itching or swelling. I only take enough to hold me for about 24-hours, until I can get to a pharmacy.
2. Spain is a first world, developed, western European country. Most every town has at least one farmacia. Most pharmacists I have encountered speak at least some English, and many speak it quite well. Certainly better than my Spanish. The point here is if you need anything or if a new need developes, you can satisfy that need at the next town. You will find the pharmacists very helpful. Take it from me, along the Caminos, these pharmacists have seen EVERYTHING.
I hope this helps.
