Very High PSA

Historically my PSA count was between 3 and 4. About 3 months ago, during an annual check-up, my PSA was 12.9. About 1 week prior I had a temperature and flu-like symptoms. The doctor felt that this could have been the cause of the high PSA. She put me on an antibiotic after which I had a second PSA test. This time my count was 10.6. I was sent to a Urologist who wanted to test my urine for any residual infections. There was none (just found out yesterday). I am scheduled for a biopsy in two weeks. I am 69 years old and my general health, I believe, is very good. If it is found that I have cancer I am strongly leaning towards Brachytherapy  (with Theraseed) treatments - the insertion of rice-sized, permanent radio-active seeds in the prostrate.Any factual information would be appreciated. I think my PSA count is extremely high - I can't find any information on what the upper limit (if there is one) is for a PSA count. I might add that for two months preceding the first PSA test I was building a block wall, 100+ feet long. Each of the 400+ blocks weighed 60 pounds. I read in another 'message board' that heavy lifting could impact the PSA count. I look forward to and truly appreciate your replies. Thank you!