Broke or not?

Back in June I hurt my foot on my son's toy he left in the floor. After 2 horrible weeks I broke down and had an xray. Nothing. Doc says just a severe sprain. Fast forward through the next couple of months with off and on pain. I'll step down on the flat ground and it will pop and start hurting again. Where my brace for a few days and it will feel better. Until it happens again. Today I went to get the biscuits out of the oven and step down and heard the pop again. I can feel something inside my foot shifting and grinding every time I step down. I cant afford another xray ($224). But I dunno what to do I'm so tired of it hurting.