MIL told me to kill myself

So I’m 23 and pregnant with my first child after 4 miscarriages and my MIL told me to kill myself. Some back story I’ve been with my husband since I was 14 years old and I’ve always struggled with depression and suicidal thoughts. I’ve had suicide attempts in the past and she told me she wish I had succeeded so me and her son wouldn’t be married or have children. She has always hated me and never wanted us together. Today she told me to just die along with our baby. I haven’t told my husband about this yet because she texted it to me. I don’t know how to go about this because we’ve cut her out of our lives but she seems to keep contacting us just to harass me.