Can you suddenly stop taking depakote after two weeks at 750mg? medication was prescribed as a mood stabilizer.

No: Everyone's body chemistry and drug tolerance/sensitivity is different. Whenever possible is best to titrate off psych meds, meaning take one every other day for a week and then one every three days the following in your case. Additionally always let your physician know what you're doing so s/he can better assist you when you go back for your next apt.