OK. This is a fairly complicated situation, in that we need to think of several issues : the effects of the original pills you were taking ; the immediate and longer-term effects of an overdose of each of them and in combination ; and the effects of suddenly having stopped them. As a month has passed, there are unlikely to be major new troubles right now from the overdose. People often don't realize that it is often a bad idea to stop any medications suddenly ( except on a doctor's advice ) rather than gradually reducing the doses, weaning yourself off them ; especially when the meds influence your brain functions.
You didn't mention whether your doctor is a GP or a psychiatrist, or some other specialist. If a GP, that's useful, but you'd probably be wise to get an opinion ( maybe a second opinion ?) from a specialist psychiatrist, to carefully assess your present condition, and what might be the best way to get you feeling better soon. I'm not sure why you are getting Magnesium in two medicines. I think at present it is being used too often in situations in which there is no evidence of a lack of magnesium, and among it's potential side-effects can be nausea, vomiting, diarrhea and an upset stomach. Discuss this with your second-opinion doctor, as it's possible you may not need extra magnesium,
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