sleeping problems

I begin school next week and I obviously cannot be missing it due to my sleep. I get the urge to walk around and be productive at nighttime and then sleep in as a consequence to that. I am a full time parent as well and my 4 year old makes me mentally tired. I do not know why my body and mind cannot be on the same page about this.

I am on 30 mg of Adderall IR and I am also tapering off of methadone (I am on 19 mg at this very moment. I was originally at 90)