Hi T.,
Stress, especially from Divorce (been there), is a huge factor in losing a lot of hair than normal. Normal loss is about 50-100 hairs a day. More than that, it's caused by stress, anxiety, lack of nutrition etc.
Get some Biotin Super Potentcy. They have 1mg (1000 mcg), or 5mg (5000 mcg). I take the 5mg one. It's the super potentcy and it's helped me a great deal. It takes a while, but you have to be diligent in taking it every single day along with a multi vitamin. I recommend Women's One A Day Multi vitamin. Takec some Vitamin B Complex as well, as we lose a lot of that during a very stressful time such as divorce.
Bless your heart. Things do get better I promise. Going thru a divorce is nasty and it takes a huge toll out of you, but it does get better. And if it helps, try to be friends with your soon to be ex for the sake of your kids, and your own health as well. Things will go much smoother if you can work that part out (ie: stress). Hopefully he's not a butt.
Many blessings to you and your family.