I Fell Last Sunday In My Back Yard.. There Is

I fell last Sunday in my back yard.. There is a slop.. &..
My left knee gave out.. While carring a large purse.., when i fell it was bad. It has only gotten worse. Everything i have read from rib /tummy/ back/ under shoulder injuries is me!
Should i get x-ray. ? I saw Dr. Today, she gave me 5mg hydrogdon.. Doesn't seem to work. Afraid to eat because last night it didn't stay down, i hate getting sick!.. Gross!!..