If you think there may have been a death in your house, there are a few things you can do to find out for sure. First, check public records. If the house is old, there may be death certificates on file at the local courthouse or historical society. You can also try searching online databases, such as Ancestry.com or Findagrave.com.
Another option is to contact a psychic medium who can communicate with the spirit world. This method is not always accurate, but it may give you some clues as to whether or not there was a death in your home.
Finally, pay attention to your own intuition. If you have a strong feeling that something happened in your house, it's possible that your intuition is picking up on something that you couldn't consciously know about. Trust your gut and see if you can find any evidence to support your suspicions.