My eye has swollen, is very bloodshot & sore. The red bit on inside corner is swollen, its watering and heavy? Been 2 days now?

Infection/Inflammati. You have signs of infection /inflammation and should see an eye doctor quickly.
? Pingueculitis. Your description is most insistent with pingueculitis or inflammation of a conjunctival lesion. Other issues an cause similar symptoms though. Try using frequent artificial tears and ointment. If no improvement, see an eye doctor.