Post root canal feeling on upper molar

I had a root canal done on #2 upper molar on 6/20. I have a crown appointment for 7/14.

I don't feel an sensitivity to hot or cold or any pain, I avoid anything crunchy or hard on that side of the mouth.

If I were to knock on my head I feel a slight feeling from where the root canal was done ..is this normal? I am wondering if it takes quite a while for this feeling to go away as I'm freaking out that maybe there was a nerve they missed?