If you want to know if it's working just get bloodwork for a hormonal panel. You're trying to figure out legitimacy of your test by gauging possible side effects or possibly increased levels on your PSA. That's like seeing if you have a fever by taking the temperature of your blankets. Cut out the unknown and get a hormonal panel done and see what your testosterone levels are. If they aren't way above the normal range then your shit is bunk.
you can ask your Dr. for bloodwork or if you'd rather keep it under wraps: