That is good news. The psa does come down slowly to start. My other half had brachy too. Jan 2015. He had a lot more problems than you. He is still on tamsulosin, I don't think he'll ever be able to come off it. He had no symptoms or peeing problems before treatment. Just one of those things I think. One year on psa is 0.6 (4.9 before brachy)
All the best to you.