Yellow Semen

I am 17 years old and recently my semen has been watery with a solid yellow color to it. I do not think it is blood, however, i am not a doctor. The last time i had sex was a over a year ago. I used a condom that time and i did not have a problem up until last week. In addition to my semen being yellow, my right testicle has become very sensitive and i feel constantly uncomfortable. From what i have read. it seems that the valve type thing that typically closes off the bladder while ejaculating isn't closing and that i have urine in my semen. Yet i am still without answers for the sensitivity in my right testicle. I am going to see a doctor this wednesday, what should i expect to hear for diagnosis and treatments to these conditions?