i do the same as you bubbles. i'm surprised they let me into other countries because of the amount of medication i take with me! co-codamol are the best over the counter painkillers i have found, i take them for arthritis generally, and also headaches. i have found they are great for getting a good night's sleep too, although, as you are probably aware, they can make you constipated.
as has already been said, any pain killer can become addictive, but if you're sensible and only use them for what you've mentioned, i wouldn't see that as a problem. if you were taking the maximum dose, everyday, then maybe that would be a cause for concern.