It means that your life and work are stressful and you want to move up.
Someone pushes you, which means someone is not working well.
You think the elevator is unsafe, which means maybe you have a way up, not a good way.
But on the whole, you are under pressure. Relax, don't take it too seriously.
Dreaming often is a poor quality of sleep. You should adjust your sleeping position. The main reason for dreaming is that covering your head affects your breathing, and your hands or body are pressing your heart. The normal sleeping position is up or right. Don't sleep in the position you are used to. When you are tired, you naturally fall asleep. Don't watch TV before going to bed. Don't think about it, adjust and stretch your body and relax your brain.
I suggest you try yoga and do something simple, that is, adjust your breathing.
There are also suggestions for relaxing before going to bed. Try yoga. One is called meditation.