Your penis should be fine. Slight bruisng is no sign of severe injury. The tenderness should subside in a few days. It may take a little longer for the bruising to completey dissapear. If you are still concerned in a couple of weeks, call your dr. They can do ultrasound on it to ensure that nothing is 'broken'. You'll be okay.
yes, the swelling will subside. But for any reason, if it does not , go see your doctor. It doesn't sound like an unusual injury- as you might imagine, that kind of misdirection happens all the time-- still, why not see a professional- no one can diagnose an injury correctly on line- they need to see you !