WTF being a new grad is rough

ugh. I find a lot of things frustrating right now. I think my constant questioning of everything I do and everything that is done by employer is somewhat exhausting. Recently though I didn't question enough. I had a patient who was seen at the emergency service the night before who they diagnosed with UTI, R/O neoplasia and stones (none were visible on the radiographs). I saw him because he had not improved on the abx. The ER had checked his prostate and said it was WNL. I ended up not repeating that diagnostic and recommending an ultrasound... well he goes to ultrasound and he has a huge prostate as well as TCC of the trigone of his bladder, and I just feel like such a jerk because I missed this, I trusted the physical exam that was performed... So now I don't know what to think if I should question everything all the time, or trust when possible. It's so difficult I guess you just keep doing whatever feels right in the moment... but honestly I will probably always check the prostate no matter what now! and probably I'll always re-check other peoples physical exams...