Skateboard cracking please help?

I bought a skatebord for about $120 from ccs and I got it this winter. I have rode it once and all of the sudden I found crack marks were the bolts that attack the trucks are (they arent huge but there are three of them) and I have had it for like 5 weeks and like I said have only rode it once beacause its so cold. I dont know if its something or if its nothing because my previous board didnt ever crack there. Thanks