Making yourself wet the bed again could be a bad decision.
What if you needed to stay over somewhere and couldn't wear diapers? It would be very embarrassing to be without a diaper and wet the bed.
The only ways I would know to make yourself wet the bed is by taking some diuretic medication though and sleeping pills but that is not recommended.
Doing things to alter your body without a doctor's recommendation is not a good thing.
Just wake and wet the diaper and then go back to sleep. No need to mess with your body.