your hob is just starting to come in to season mate, they way to check is check t see if his balls have dropped, not being smart as the hobs retract them during the winter and normally only come into season a few weeks after the jills start to come into season, but he will be fine give him another try in a weeks time if his balls have dropped mate.
Swelling will show signs of going down after 7 days but can take up to 21 days to go right down.