Actually this sounds more along the lines of what people call OBEs rather than WILD. When you get to the sleep paralysis stage, do you struggle to get out, and then find yourself in your dream? When people struggle to get out of sleep paralysis they commonly experience something very different than a true WILD. In sleep paralysis your head and body are extremely heavy, almost like they are being magnetically forced back down into bed and you have to struggle out of that. Once you struggle out of that and are able to move around, the movement can be either floating...to where you must grasp onto objects to propel yourself, or you might sink through the floor, etc. This is what people have termed an OBE. (also it would make sense for your limbs to be invisible during OBE)

An actual WILD would take you through the stages of sleep paralysis and hypnogogia and land you in an actual dream...where you would not have to experience that heaviness of getting out of your bed, because you are already dreaming.

Do you know the difference between WILDs and OBEs? Were you attempting to do one or the other? If you don't want to deal with any of the issues that come with an OBE, then wait longer through the SP...until you are properly carried into a lucid dream. Hope that helps.