Husbands manic episodes

It’s like clock work. My husband has a bipolar manic episode every single month during my two week wait! He goes off over nothing and walks out on me and my daughter. Today it was because after I worked a long 9 hour management position he told me I was stupid for not properly measuring 2 tablespoons of butter. Really. Told me I was a B and he wants a divorce. Threatens it every time he does this and leaves. I am so exhausted guys. He tried a therapist and dr for meds and quit them already saying he could fix himself but he gets worse. 😫😭😭😭