I had a lot more energy at 18, and used to walk the 8 miles home after a night out, frequently - can't even walk a mile these days without wishing I had bus money - I'm only 28!
Glad yer ok.
Things are usually fine when you fall, I fell on thurs night and the only thing I worried about was the huge deep hole in my knee.
This is my 2nd baby, 4th pregnancy. Withmy first, I got every thing checked every 5 mins. This time, i'm just going with the flow. but it did sound bad that you had pains etc - glad yer fine!!!