fell on stomach

I know what most will say and that's get off the internet and go. however, the roads here are really icy and dangerous and I don't want to take the risk of going out in it if I don't absolutely have to. anyways, I fell earlier because someone had I guess kicked one of the stones we have making our walkway and kicked it in the middle of the path. I have been having mild cramping with no bleeding. but every now and then I get a sharp pain. it is mainly in my lower back and upper stomach. should I go to the ER to get checked or hold off unless there starts to be bleeding or worse cramping.