Is this a form of harassment?

So I’m currently pregnant and my boyfriend already has a child. His baby mama has borderline personality disorder, PTSD, bipolar disorder,depression and ADHD. I have done my best to be respectful and let her do her thing. But after we talked things seemed better until she found out I was pregnant and she was pregnant with my bf shortly before they broke up. She ended up getting an AB and she has been going off ever since. I know she’s in pain but she’s coming at me. Sending me an ultrasound of the baby and telling me “ I hope your baby rots” she told me little petty comments and I told her I’ve never done anything to you to act this way. She told me to watch my mouth and she hopes I wake up in a pool full of blood because I miscarried. That is a very painful experience for me. She said I’m ugly nasty and greasy. I just want everyone to know I’ve never done anything to her. Never tried to fight or call her a name. She genuinely has the whole time except for the time her and I talked have said nothing but bad about me.