In reply to captain paranoia:
Like you say OP not registered with GP so that or practice nurse not an option. Some hospitals have minor injuries clinics as well as A&E, but not all, and they tend to be 9-5. OP complaining of swelling and pain, suggests infection. Possibly anaerobic, possibly in joint/bone and with a wee risk of septicemia, all potentially serious.
Would be very interested if any A&E consultant/nurse cared to share an opinion.
They don't want to treat sunburn, colds&flu's, hangovers and all sorts of stuff that folk turn up with, but do tend to like to see stuff before it becomes critical.