Ah, expectations! They really can mess with the mind.
I injured my legs last week. Two pulled muscles, I believe incurred from my workout program. I like the exercises I do and with some modifications to try to avoid the same scenario was looking forward to starting up again as soon as possible.
I took Friday and Saturday off from exercise (other than Yoga) in an attempt to let the muscles have some rest. And yesterday they were feeling much better. My expectation was that I would be able to start in on a partial workout this morning.
Then I had trouble sleeping last night. And I woke up this morning tired and my muscles were quite sore. It would be easy to push through that and do what I planned to do.
But instead, I am honoring my body's messages. There is absolutely nothing wrong with taking another day of rest except that it doesn't meet my expectations. So if I release the expectation: then everything is right where it is meant to be.
What I get is what I need, not necessarily what I want. As long as I remember that, then the bumps in the road seem a lot smoother.