Hi thanks for the query.
the complaints you had described like severe pain
on your shin bone could be pretty bad injury
to the bone underlying. the swelling or bump is due to localized collection of blood and inflamed tissue. I advice you to consult local orthopedic surgeon who can advice you an x ray
. Continue elevation of limb and local ice application till the pain settles. Your doctor can prescribe you some analgesics to alley the pain.