Maybe I'm just not as cautious as everybody else, but I wouldn't go to the doctor yet- I'd wait and see how it feels tomorrow, unless the pain is absolutely unbearable. Sometimes after falling it gets difficult to walk, but sometimes something'll pop or stretch back to where it's supposed to be and the pain goes away. xD If you still hurt in the morning, though, by all means, go see a doctor.
Edit: Slight bump on your forehead? o.o That kinda scares me more than hurting your hip. I retract my statement about waiting to see the doctor. Possible head injuries are no fun.
"There's no such thing as a problem horse. Just people that cause problems for horses." - Unknown