The funny thing about fitness is that it reduces stress, but at times it can become stressful due to time constraints, work load, or personal factors.
As I always tell you, if training is going to cause more stress than relieve it, don't do it. You can try again tomorrow.
But before you decide whether it's a yes or a no, ask yourself how you think you'll feel afterwards. Will you feel slightly better, or slightly worse?
If it ends up being a no-go, ask yourself a few more questions:
If not a lifting session, how about a walk outside?
What if you put your gym clothes on and warm-up? Does that change anything?
Could you turn your RPE 8 day into an RPE 5?
What if you did some mobility work instead?
Something is always better than nothing.
There is a healthy gray area between forcing it and saying f it.
A win-win scenario exists, you just have to define it.
Taking a step back doesn't have to mean giving up or quitting. It simply means taking a step back now to have more capacity later.