I have somehow injured my left ankle. i'm not sure if it is sprained, or there's a hairline fracture, as it's so painful even to bear weight on it or walk. i am limping very badly. it is very swollen, bruised and tender to the touch. please help me?

I recommend you see someone there who can examine you and order an X-ray if indicated to see what is going on.

The Ottawa rules are usually used in assessing for the need for imaging for ankle injuries and either your doc or a local urgent care should be able to assess. It does sound that you suffered at least a severe sprain.

Your symptoms warrant an in-person assessment and likey and x-ray examination. It would be prudent to see your doctor.