What Causes Urine Leakage And Pain In Anus,testicles And Groin?

Hi,I'm 16. For the previous month or so, I've been experiencing mild urine leakage after urination and occasional pains in my anus and scrotum (i.e. once a week). Over the past three days, I've been experiencing a mild ache in my groin/abomen/testicles. The ache is most prominant on the left side, although it is felt on both sides. I've since examined my testicles and nothing seems out of the ordinary. Furthermore, my semen is getting more thick and my orgasams are feeling more intense; this has been a development only over the previous few days, too. Do these symptoms pertain to anything in particular? I'm not experiencing any major irritation, but I would like peace of mind. Thanks.