I can relate from both sides of the spectrum, but I am not a mother.

It can be difficult and scary when a close friend or family member is struggling with mental illness and being suicidal. Sometimes we don't want to believe it, so we push it away with anger. That anger becomes toxic and may lead to lashing out because of fear or annoyance because they may not understand. I can tell she doesn't want this to be happening to you and it probably frustrates her which could be why she acts so catty.

With my suicide attempts, I have hurt many many people in my life including my family. They've acted out in anger and hurtful words and actions which made things worse on my side and overall made our relationship more damaged. She could feel hurt or abandoned by your struggles which isn't your fault. Your intentions and suffering aren't being perceived by her the way you wish.

Have patience, give it time. Let things settle back to normal. And communication is always key. It would be wise to express your hurt in an "I-feel" statement, avoiding using "you" in your sentences so she doesn't feel accused and will be less defensive.