Hi everyone, I'm new, and I have yet to achieve lucidity, well, since I have started practicing techniques such as WILD, which was almost a year ago, but I believe I did occasionally have lucid dreams as a child/teenager and lost the skill as I got older. Anyways, I wanted to throw in my opinion because as a teenager I experienced a few instances of sleep paralysis, and I believe that as long as you know what is happening, you will be ok. When I was a teenager and I would get sleep paralysis, I would be terrified. I thought for sure that something horrible was coming and attacking me, and one time I experienced sleep paralysis and dreamed/hallucinated that I was tied to a rock and there was a spider attached to it by it's web, and it was slowly floating down on the web towards me. I hate spiders, and I was terrified out of my mind. It was such a horrible experience that I can still remember it vividly. I also experienced times where I would feel vibrations so strong that I thought someone was shaking my bed and would get up to look and make sure there was no one there.
Now that I have read lots of different articles and opinions about astral projection/lucid dreaming, I can experience vibrations and a much much more slight version of sleep paralysis compared to what I used to get and know that this is completely natural and I am ok. So, I don't think you need to be worried that you are going to go into a sleep paralysis and start experiencing a horrible lucid nightmare. Obviously, I can't promise that, as I am no expert, but I feel like based of my experiences and what I have read from others, if you go into it knowing that is is completely natural and happens to other people, and you have the intention of having a lucid dream, you will have enough focus to prevent terrifying things like that happening. I think there is a good possibility that I experienced terrifying things like that because I had no knowledge on the subject in any way. Having educated myself to a certain degree in lucid dreaming and things related to it, I feel completely ok.
If you do happen to start experiencing sleep paralysis, the important thing is to tell yourself not to worry, and that you are in control of the situation. Try to control your breathing and repeat a calming mantra to yourself. Visualize yourself surrounded by bright white light. I also like to visualize numbers in my head and count my exhalations.