Originally Posted by
Walkthevoid
What may have happened (and it happens to a lot of beginning wilders) is that your finger started to tingle, as your body will if you lie still in one position for a long period of time. Then, your brain things "Oh my god! Is this SP? Could I be starting to wild?" all these thoughts start to go through your head and your mind gets excited becaue it things it's starting to wild (hense your heart racing).
I'm not too sure because I've only managed to wild once or twice but from what I've read it is very hard to wild before any sleep (some argue that it's impossible, especially for a beginner). So perhaps it's worth trying it after some sleep to check.
Hope that made sence or helped at all :)