If you were vacuuming in a dream, then it suggests you to take back the management of your life. The vacuum could also show the need off cleanliness and tidiness within your thoughts and feelings.
Dream dictionary: vacuum dream meanings
Presage of happiness and appreciation from friends.
…respect from others, which makes her to force herself to behave in a certain way, which is unpleasant to others. This dream warns that you should be humble. Dreaming that youre declining your religion can mean that you are experiencing a lack of emotional and psychological balance and that you need to find harmony and be reasonable beyond prejudices. Dreaming of abandoning one’s religion may mean that your friends, co-workers and businesses dont agree or are not in sync with your way of thinking, and thats why you feel sort of a social vacuum. Dreaming of monks, nuns or religious things, especially when you are going through difficult moments, may mean that you will soon receive some help, and it will perhaps be unexpected. Dreaming of discussing religious issues may mean that your behavior is damaging your own personality, which will result in problems at work or in business….
…Darkness or something black in a dream can mean the absolute vacuum symbolizing death, mourning and darkness. The black, which is the synthesis of all colors, is symbolizing virginity. Although almost always when black or darkness appears it’s the negative aspect that alludes to the inferior and left side of the human psyche, symbolizing all evil, the sinister, melancholy and death. This absence of color dominates the dreams of psychopaths and those of normal people when they are mired in depression….