I fell down the stairs and landed on my hand. It doesn't seem swollen. It doesn't even ache when it'…

I fell down the stairs and landed on my hand. It doesn't seem swollen. It doesn't even ache when it's at rest, but if I touch one spot, the pain is excruciating. My thumb immediately goes numb and it radiates to my shoulder. Six years ago, I fell and had a fracture that I didn't notice until two weeks later when they put me in a cast. Do you think it's a crack or a bruise? It's just that the emergency room is 35 km away.