I have had a bruised rib for 1.5 years, what should I do?

Hello, I severely bruised my right ribs while go-karting last August. At least, I think it's a bruise. I've already had an MRI and nothing's broken. Nevertheless, I have a dull pain in my right ribs every day. I've tried everything from ointments and tablets to months of rest. Does anyone know what else it…