Got some x-rays taken of the hip and the actual joint is just fine - no damage or displacement. What I am experiencing is a deep muscle bruise with swelling and I need to take it easy and do some exercises to restore range of motion.
Good to have a concrete answer as to what was happening.
Stopped off in town and picked up a couple to-go boxes of Chinese food so we will be eating tasty leftovers for the next day or so - keeping things low-key at the farm...