I had a personnel shock myself some years ago. I was terribly stressed out. I lost 30 pounds, had hugh black circles under my eyes, my hair was falling out and my finger nails were so brittle and thin.
Some of what you are describing sounds like menopause,while the other half sounds like a sad grieving mom.
The hot flashes are a gimme. I still have them at least a dozen times a day. I do not get a period anymore but i still have them stupid flashes. I also have PMS, go figure. I will bet on it that you are going thru meno. Some women have an easy time, so don't. Ask your Doc for a little something, or check the Natural Food and Drug Store. I took black cohosh for a while and also St. Johns Wart. It helped a tad bit. I am so sorry about the loss of your baby. You have friends and supporters here. Just come in. Hugs to you.