HI THERE....I TRIPPED AND FELL OVER A BOX ON THE

HI THERE....I TRIPPED AND FELL OVER A BOX ON THE FLOOR OF THE HOUSE WHILE I WAS CARRYING ANOTHER BOX OF STUFF MAY I ADD IN THE HOUSE ABOUT A MONTH AGO AND LANDED ON MY KNEE WHILE STILL HOLDING THE BOX IN MY HANDS!
I FELT AN IMMEDIATE PAIN IN MY KNEE WHICH HAS SINCE SUBSIDED AND HAVE HAD ACUTE PAIN IN MY BUTTOCK,GROIN,INSIDE RIGHT LEG AND RADIATING DOWN FROM MY KNEE!
i'M ASSUMING I HAVE PULLED/SPRAINED OR TORN A MUSCLE SOMEWHERE AND THINK THAT I HAVE NERVE PAIN ASSOCIATED WITH THAT OK!
HELP ME PLEASE!?