Hi, Davidss - I too was very anxious about the biopsy, more so since I had pretty much perfect health up until that point, and had never had a medical procedure more involved than a coloscopy. Seeing my anxiety, the doc prescribed an ativan before the procedure, as well as a painkiller, both of which helped a lot. The whole procedure was uncomfortable but not painful. It's ok to be honest with the doc about the fact that it makes you anxious. No shame in this, and the doc can help you deal with it.
Yes you can get the doppler, and you can also get a free psa test, which may clarify things. But in the long run your anxiety will be lowered the most if you do the biopsy and find out what is really going in in there, (or find that nothing is going on in there.) Either way, you'll know -- and can take action if necessary. But without the biopsy it's just guess work.