
Jacob, many people hear noises at exit time: buzzing, whooshing, banging, etc. It's very common. Sounds like you have reached the stage of paralysis. That's good. It means that you are nearly ready to AP. Stay calm and relaxed and in due course you should be able to AP. Some people use techniques such as the "rope method", whilst others just float out gently and naturally. There are no rules about this. It all depends on the person.
Warmest best wishes!
Astral projection takes time to master - for some a short while, for others a long time (ranging from days or months, to in some cases even years). It all depends on the person.
There is an excellent half hour free binaural recording here:
http://www.multidimensionalman.com/Multidimensional-Man/Free_Deep_Meditation_Sounds_-_Binaural_Beats.html
You must listen to it with headphones, otherwise the background beats will not received correctly by the two halves of the brain. These beats help the mind to settle into the necessary lower brainwave frequencies: alpha and theta and delta.
Hope this will help you.