Years ago, I worked with someone whose mother was sent for diagnostic medical tests. Since she didn't hear back from her doctor's office, she assumed that her tests were negative.
Sadly, a simple clerical error and the assumption that "no news is good news" cost her life.
I've never forgotten that story. In fact, I repeat it often, especially when I hear people say that the doctor hasn't yet called them back regarding their test results.
I feel that as the owner operator of your body, no one has more of an interest in keeping it working well than yourself.
Mistakes happen. Files get placed in the wrong slot. A simple phone call or follow-up appointment will put you back in the driver's seat - giving you more control over what often seems like an uncontrollable situation.