I Have Insomnia

Blankie<3... I have bad insomnia and I sleep with my blankie and suck my thumb... I'm trying to stop sucking my thumb and I'm also trying to get blankie out of bed. However, when I try this, I can't sleep at all... Like, it's worse than normal... On a normal night, I might get 4 hours of sleep, but with trying to break these habits, I'm lucky to get 2 hours of sleep... Help!