Music represents harmony, or the lack thereof, in your life.

A pub represents how well you relate to others. That there is aggression in this place, suggests you feel there could a problem with alcohol, or something related to this type of public place.

Being chased symbolizes something you are avoiding...something you don't want to face.

That you noticed the walls, suggests that you feel there is a boundary of sorts in your life.
White represents awareness, clarity of mind, purity and cleanliness. Also represents, healing as in a clinic or hospital.

A body usually represents some area of your life that you feel has 'died'. Feelings of hoplessness in a relationship, loss of feelings for someone, loss of a job...etc. The dead body could also represent a part of yourself you'd like to leave behind....to 'die out'.
That it was bloody suggests and issue of anger you may have towards someone, a situation, or yourself. Usually if we have anger we repress or don't express in our waking lives, it causes violent, or bloody images in our dreams.

Stairs symbolize that you are 'taking steps' toward something in your waking life, or you are facing a challenge. That you are using them to escape suggests you are trying to escape from urges, or 'desires' in your waking life, also suggests a lack of confidence.
__  __  __  __  __  __  __  __  __  __  __  __  __  __  __  __  __  __ 

Is there a health issue(you or someone else) you are dealing with, or concerned about?
Do you, or someone you know, have a problem with alcohol?
Are you in a situation that is making you feel hopeless, or 'disconnected', or angry?

Hope this gives you something to go on.
Good Luck.

I am sorry to hear that you have troubles, but hopefully, now that you understand what your dreams are telling you, you may be able to resolve some of the issues.
Hugs n' luck!
J