answer:I am no medical person by any means. But sounds like a bruised foot? In which case, I Googled it and most recommend pain tablets. I would imagine cold packs might help. Elevation, or heat pads. If it is bruised it should have discolorations on the foot? I think a crack on the bone too would have similar symptoms so obviously if not feeling better in a few days, an X Ray is recommended. In terms of the interview. I would take a good dose of pain relievers. Ones that do not make you sleepy. Maybe a rub with a healing balm, like this If you are still walking a little wonky just mention you were at gym or doing a cross country run. I’m sure they would like to know you work out, or keep fit and are healthy.