Loud noises

The first time I started having sleep paralysis, I always felt like I was levitating or I felt like I was going on a roller coaster, but lately I start hearing very loud sounds in my ears, white noises and interphones. Besides that, I always dream of things that I can't remember. Sometimes I have sleep paralysis, then I dream back and then I have sleep paralysis again. It is normal? My biggest fear is that I won't end up having horror experiences, so far I haven't seen any demons when I had sleep paralysis. Most of the time I have sleep paralysis in the evening only if I slept after dinner. If I sleep in other positions I don't think I have sleep paralysis, but sometimes it's a great feeling and since I started having sleep paralysis I only sleep on my back because I find it interesting that I can have different experiences in sleep