I sense that there's something off with your home but it's not a bad spirit ....it's more like mold or dampness. You should open all your windows, dust all surfaces, vacuum the floors and clean very well.
Get rid of any piles of washing or clothing/bedding which you've got sitting around...launder them and put dried lavender in with them once they're dry and folded.
Get your windows cleaned and open windows daily. The lack of air flow and dampness is causing the bad feeling.