It might just be a coincidence that you couldn’t go back to sleep when you used WBTB+MILD. But if you feel that WBTB is the problem, then don’t use it. Do you usually have problems with getting back to sleep after randomly waking up? Here you might find some ideas on what to do if you usually need a lot of time to fall asleep (again). If you risk losing sleep by using LD methods, only attempt them during the weekend for example.