Stress causes Stillbirth? Advice PLEASE

So I’m an extremely anxious and stressed person and have been throughout my pregnancy. I have chronic pain and the anxiety about the health of the baby kills me. I’m uncontrollable and crying I have my days and sometimes it might last a week it’s been on and off the entire pregnancy . I am currently 24 weeks. Has anyone experienced a stillbirth because of stress? I have read it can increase your chance but Isn’t the primary cause. This is making me worry even more than normal. Thank you