It's no use hanging a mirror. The function of geomantic omen usually lasts for several weeks. If the feng shui master hangs you up and he has blessed you (commonly known as opening the light), then its effect can last a little longer, but it won't last more than two months, which is the second.
The mirror you hung at the door should be called "Congenital Eight Diagrams Mirror" and dropped. If you want to hang it again, just change it to a new one. Furthermore, the Eight Diagrams mirror has a better blocking effect, but the blocking effect of the knife and pen is limited. This is the third one.
If it is really a feng shui problem, it should be three days after you change Feng Shui (three days for small Tai Chi) and within 25 days (big Tai Chi cycle). This is the fourth one.
So don't leave feng shui things lying around, not only on that fierce day, but also useless. It is recommended that you be foolproof, landlord, do more good deeds and live a natural and comfortable life.
You should be young. Don't be bound by these things.