CONCERNED PARENT ABOUT NEW MEDS MY SON IS ON VYVANSE 30 MG...?

MY 8 YEAR SON HAS BEEN ON THIS NEW MEDS VYVANSE 30 MG SCENT OCT.9 AND I HAVE NOTICED THAT HE IS MUCH MORE AGGRSSIVE, CRYING MORE AND NOT ABLE TO SLEEP AT NIGHT AND I AM VERY WORRIED ABOUT WHAT TO DO...I HAVE CALLED HIS PEDIATRIC AND THE DOCTOR WHO CHANGED HIS MEDS AND NO ONE HAS GOTTEN BACK WITH ME YET STILL WAITING PATIENTLY...CAN SOMEONE HELP ME PLEASE....DONNA B