Lower Abdominal/Penis muscle strain?

[starwarsfan]

I've been having a pain that goes on and off in my lower left abdomen and just to the left of my penis.  It is not a constant pain, but it almost feels as though I strained a muscle to the left of my penis and up close to my bladder.  I can feel this pain when I move my penis to the right by hand at a certain angle or when I apply some pressure just to the left of my penis, and sometimes when I press on my lower abdomen around my bladder.  I have also felt it slightly when I touch my left testicle to try and locate exactly where the pain is at.  I have seen my doctor and asked him about this several weeks ago, and he checked for a hernia but found nothing.  He didn't indicate any other problems and mentioned it could be some internal muscle scarring of some kind.  I have another appointment scheduled in a little over two weeks as I continue to feel this off and on.

Again, this pain is not constant, but comes and goes with certain movements, or pressure applied in manners noted above.  I am very curious to find out what this could be and if there is anything that I can do about it.  What are some other potential causes for pain of this kind?  Again it feels like there is some muscle or something out of place and hurts when I touch it or move in a certain way.  Any insight would be greatly appreciated.        

[starwarsfan]

I forgot to mention that I am 30 years old in my original post.