Nah, this was 3 site changes in a row. All the same. As I said in another comment, I think it was just that my thighs were "tired". But time will tell today.

Nope, none at all. I have since worked out that this might have been a "tired" site if that makes sense. I've used my arms for the past few weeks and not had any issues. Just switched back to my thigh today and will see how it goes :)