Perhaps you could try a different method for staying aware. FILD might work well for you, there is a description of it Here and you can ask questions Here.
I’m guessing you already did it with WBTB, I don’t think you said though. Perhaps you could try spinning in the dream or just staring at something? I’m guessing you already know those techniques though, sorry I couldn’t be more help.
I wouldn’t say that you did something wrong exactly, I believe that to WILD you’d need to take your focus away from your body. I wouldn’t worry about sleep paralysis, if you forget your body, SP will come. If you focus on your body and how it feels you mightn’t get to sleep. 