Is my wrist sprained or fractured?

Was push starting my dads car when he braked by accident i fell onto the road landing on my wrist. this happened 3 days ago. i din't have much swelling or discoloration but it still hurts. i can sorta flex my wrist up and down and without much pain but if i move my wrist sideways (the side my thumbs on) it hurts heaps and i can barely move it. Any thoughts haven't been to a doctor yet as well.