Jammed my hand in the door frame, i was closing door behind me and didnt move my hand out of way. Back of hand feels painful and slightly swollen and starting to bruise. Cant touch area as its very painful and a weird tingling sensation though can move my fingers and curl my hand into ball but cant straighten hand out properly. When lean weight on hand its painful. Never broken a bone or injured my hand in this way, any ideas as last thing i need is to be off work or spend a few hours in ane.