I got stood on my left foot in football practice, it's swollen, slightly bruised, hurts and sore to walk on, what should I do? And could it be broken?

See a foot doc. Yes it could be broken. Ice and elevate it until u see the doc.
Injury. it could be fracture, hematoma or even clot . check with your doctor . need X ray and sonogram to rule out DVT.
RICE treatment. Count on it. Your symptoms have all the makings of a fracture. You need to RICE it. Rest, Ice, Compression, Elevate. Although there is a possibility of just soft tissue damage, it is best to treat it as a fracture. Have an x-ray taken to verify either way.