Pains in my hip causing me problems!!?

When I was younger I had a dislocated hip so i've its always been weak but over the past few months it has been really painful that bending down and walking up the stairs is a struggle. I'm experiencing shooting pains and its usually on a night after a day at college or work, it feels heavy as well and even my knee seems tense sometimes :( i'm off to the hospital tomorrow to get it x-rayed, expecting the worse. What do you think it is? i don't do sports or the gym either.