Guys, guys, guys...

Getting into SP is not the goal. In fact, you will not get into SP, untill you fall asleep and dream. By then, if you notice SP, you will be so far gone, you will not give a hoot about if you in SP or not. Because by then, you will be in a Lucid dream. THAT is the goal. To fall asleep at the same time when dream is ready for you.

All the sensations you felt, are not SP. Getting heavy, tingling, ... those are simply sensations of our body shutting down.

So the correct thought would be "great, I'm entering LD". But don't get too excited, just observe passively. Good luck