I'm afraid a nasty shoulder injury has stopped me from picking up a camera for the last 4 days, and it's unlikely i will be holding one for a while yet.
I feel your panic from here
... but you can relax, my injury wasn't related to camera/lens.
I'm sure you'll find it lighter in use as you use it more... and your muscles will tone up a bit. No one will be kicking sand in your face down at the beach