Just found out I have trichomonis?! I am so pissed! How do I approach hubby?

without anger? We've been together over 9 years. I've had check ups prior till today and I was clean. Today, finding out I have an STD I am beyond pissed! I had to have gotten it before he went to jail in early March. I used Vagisil powder and thought the irritation and itching I was having was caused by it. Which means I've had this probably about six months now! My doctor prescribed us both antibiotics to take fopr two weeks. I was so mad I cried in the dr's office. He asked me to be rational when approaching my man, saying that we've been together a long time and to talk through it instead being angry about this. It's easy for him to say, his wife didn't give him an STD! I don't know how to go about this, I'm so upset. My man has been having sexual relations unprotected and I'm scared he may have given me more than trichomonis. Lord have mercy, how would you deal with this? Please, no rude or degrading responses. I already feel bad enough.