This would be much better explained by the professionals involved in your care- I would advise you to explain to them exactly which bits you don't understand and they can make it clearer. WebMD is on the approved list of links for the first aid board, so I can share
this link with you if you would like to read it, but it's nowhere near as good as a personalised explanation from the professionals involved in your care!
I hope you are able to discuss this with your team and that they explain it in a way that you can understand.
I'm now going to close this thread as there isn't anything more that we can say within the rules of the forum as you are under the care of a doctor for this.