Good job, Catrin. I've been known to overdo it myself, and while mine comes out in physical illness, rather than injury, I find that short rides, of like 45 minutes are sometimes just fine.
It's a gorgeous day here and I just got back from a 33 mile ride with my friend who has been at her house on the Cape most of the summer. I wanted to do a group ride this morning, but it takes up too much time. However, it's 2:00, I just ate lunch, and I now have 2 hours to study a bit for my licensing exam, and then see a client. I think we dawdled and stopped and talked too much! But, I love this weather... started out at 60 degrees and is now 73.