When i did my semen sample and enterococcus faecalis was cultured what is the chances it was contamination if i got in the shower, urinated and then washed all over then did the sample straight after getting dry with a clean towel?

Semen infection: E. fecalis could indicate true infection or could be a contaminant. Judging this depends a lot on how strongly positive the culture is, i.e. only a few or lots of bacteria and other findings, like symptoms and white blood cells in semen. If in doubt, repeat culture might be needed; follow your doctor's advice. If it's a contaminant, it has nothing to do with showering and how you dried yourself.