What is wrong with my calf?

So on Friday night, I was sleeping when my calf got an excruciating cramp that Wouldn't go away. I was straightening my leg and whatnot, and finally after about five minutes and some tears it went away. On Saturday everything was fine, I played soccer and just stayed home. That night, my calf started to ache again. I just dealt with it and kept walking around and stuff. Then on Sunday the pain was unbearable. It was hurting whenever I put weight on it so I was limping. However I played soccer with it and during the game it didn't hurt too much. I came off the field and it felt really sore again. I came home, just layed on the couch and hobbled around the house. I got my mum to put some dencorub on it and massage it in but it didn't really do anything. Now it is Monday morning and it still hurts to put any weight on it. Can somebody please give me advice on what is wrong? Thanks in advance