I had a fall down the stairs and IV got quiet a big lump appeAr near the ankle area my whole ankle and the top half of my foot is swollen very red and?

See a doctor. May just be a bad sprain. An X-ray would rule out a fracture. Elevate your foot, apply a cool compress, stay off of it, and wrap with an ace bandage for support. See your doctor.
You need a doctor! You should see a doctor right away. You will probably need an X-ray to evaluate for a fracture. In the meantime: Rest it (stay off of it), ice it, elevate it above the level of your heart. .