I fell down playing basketball a couple of days ago, and now me right foot hurts whenever i walk (but it doesn't when lying down). what should i take?

Alleve: Use ice and limit activity. Take alleve one or two twice a day, as long as you have no GI issues. Don't wait too long to get professional advice if you are not getting better. If your discomfort increases get an exam and x- ray asap.

You can take an : Antiinflammatory while you are trying to make an appt to see the foot doc to see what the problem is. Perhaps a stress fracture? Perhaps a sprain?