I am a bipolar disorder person, eating aripiprazole 10 mg in morning, aripiprazole 30mg and divalproex sodium er 750 mg at 6 p.m. when i eat medicine at 6 i get very down from 5 p.m to 7 p.m. ?

Different : medications can affect people at different doses. It may well be the higher doses, but it's best to let your prescriber know about this. He/she may be able to alter the dosing schedule.

Maybe overmedicated.: It sounds like if you may be overmedicated. You may want to tell your doctor about this so he may adjust the dosage of your medication.