Twitching?!?!?!

So when I go to sleep normally (Lie on my side) I do not twitch at all but when I lie on my back as i was trying to do a wake back to bed after like 10 minutes and I started getting really relaxed and started to feel like i was spinning then I started twitching like in my lower back I do not know if it because I take Metaxalone for shoulder injury but Whenever I get into the point where I am like spinning I always twitch in my lower back.
:P

If you're trying to WILD, do it in your normal sleeping position because you need to actually fall asleep and to do that you must be comfortable. I also recommend stretching all the tension out of your body beforehand because you've been still for a long time and your muscles need to be stretched out. Try using a mental anchor so that you can forget about your body and just fall asleep with passive awareness :)