5 year old with sensory proccessing dissorder

Hiya my 5 year old as spd she as severe anxiety which makes it very difficult for him to sleep have known him to have an hr sleep he doesnt feel safe when hes asleep he also as speeech delay he as saw an occopational thearpy and adviced he needs a safe place we have tried a safety sleeper which is medical equipment can use it at home day and night and can also take it school with him if need to.