Yes, I am much older than you and I still struggle with SI. I have gotten so much better, but this week has been especially difficult and I have SI'd for the first time in many years. I think this time of year is a trigger for me. So, don't feel alone. Try some of the things on the post for things to do instead of SIing. Red marker, tooth brush, etc. I hope you stay strong, but if you slip, don't beat yourself up. That will just make it worse. Forgive yourself and go on. I'll watch for your posts, so let us know how you're doing with this.