Hi Klaats:
I had this issue for the first few weeks but none thereafter. HOWEVER, I was told by both my urologist and radiation oncologist that this could happen in some cases even within a couple of years of the procedure. I was also told that the semen could be darker than usual for a long time.
You may or may not need a "visit". Why don't you call your urologist and/or radiation oncologist ASAP and ask them what they think...?
Tudpock (Jim)