Fell through porch, a 2 by 4 came up and hit me on my right side, it caused a lot of swelling and a black eye and major pain around cheek area, happen a couple weeks ago, why am i still numb on right side and still have pain?

You can be numb where the board hit the cheek area for quite some time from the impact on the nerves in the skin that give you sensation. Think a couple months. It can also be sore for more than a couple weeks due to bone bruise (or even a slight undiagnosed fracture if you have not had it x-rayed) and deep muscle, tendon and ligament pain of the face tissues which are also bruised.