No longer ttc

I'm extremely upset about this decision, but I can't continue to put myself through this when my SO's ex-wife won't get out of my life. She's saying I shouldn't be around her son and keeps threatening my SO's custody rights. He's not really sticking up for me and I've been in tears for days. She left me a particularly venomous voicemail that caused me to have a panic attack. My stepson just turned 8 and I can't deal with another 10 years of her unstable rantings. She needs psychiatric help and she refuses to get it. I'm on medication for anxiety and panic disorder. I have fibromyalgia and IBS-D. I just can't fathom trying to get pregnant with her anywhere near my life. I think I would miscarry again from the stress alone. I wish everyone the best. Baby dust and blessed be.