Hip pain

Hey guys, I'm definitely going to see a doctor i just wanted some advice and to see if anyone had something similar. So last week i went for a walk and on my way back i noticed my hip started to hurt a little. It wasn't anything out of the ordinary i figured i had just twisted it or something. Well i went on another walk and the pain got worse where i actually noticed it. It continued to be sore for another day or so. Then it would only hurt at night when i was lying in bed. I went on a walk today and it really started to hurt to the point where i was limping and almost cried because it was so sore. I noticed that the pain also started to go down to my thigh a little. It still hurts when i sit down. I've tried stretching but that doesn't help. Has anyone else gone through something like this. I'm 21 and very physically active and have never had problems with my hips. Thanks guys.