I been attemping wild's lately, and all been well(fallen alseep at times) but NOW!

I been having issues. SP only comes half way! i daydream to keep my mind busy and off my body so i dont Swollow. all sudden, i feel SP hitting my legs. then my arms, then.... It stops. For some resion lately, it's been stoping at my Legs, and arms, my chest/head are like fine, Only my legs and arms have SP feeling. Why is this happending? cause once i notie SP, i usaly concentrait on it. Is that bad?