First things first.. you might find it difficult to handle your wife at home. You will need to get her to a place where you can minimise harm to herself and others. As a family member , the best thing to do is to get her professional help. What medicines , what dosage, how often , how much , how long... Trust your Psychiatrist to make this decision. All Psychiatrists work only to help such Patients. Trust your Psychiatrist.

Hi I know you are going through a difficult phase. You need to understand bipolar disorder is a life long disorder and she will have periods of depression hypomania and mania in them, it is important she remains on medication like mood stabilizers for a long period of time. Stress like pregnancy can precipitate mania or depression. Most of medicines are not given during pregnancy and few are given during breast feed, as they may have small risk for the baby. But as the pros are lot more than cons in your wife's condition, I would strongly recommend her to be started on medication again under a Psychiatrist and if need admission for few days. If she is not stabilizing with current medication, she can be changed to other medicines and admitted to bring her condition in control faster. Hope this answers your question Take care

Start her again on treatment , may b she will need hospitalization