I twisted my ankle walking an now the side/bottom of my foot hurts. what should i do?

X-ray: You should be seen by a podiatrist and have a x-ray taken of the foot to first be sure you don't have a jones fracture which is a fracture of the styloid process of the 5th metatarsal which often occurs with these injuries or you could have a lingering insertional peroneus brevis tendinitis which is the tendon that inserts there and got strained with the inversion injury if that's what occurred.