How bout poster #4, you're a pussy and shouldn't go to the doctor yet
it doesn't even really hurt, just a bit stiff and weak feeling? And you're going to waste a doctors time after only 1 week of you not even being in pain...just alternate ice and light stretching, should feel better by the time you get to the doctor, then you can have him give you a physical to make sure your balls are still there. It sounds like a bruised muscle(usually no visible bruise for me) or a very minor partial tear(doubtful). The feeling you describe is the same you get after a hard workout or any minor sports injury, I'm guessing you don't get out much.
If it doesn't feel better after a month or if it starts getting much worse(can't walk, you're actually in pain...) then you should go to the doc.