Welcome Oodles1977: I'm so sorry about what's going on with your mom. Your story matches those of many others with similar circumstances. We are all human and have a breaking point, especially after years of enduring abuse and/or frustration.
I know I should have tried to maintain the upper hand and not feed her thirst for drama, but I have honestly reached the end of my tether. This woman has emotionally abused me for 39 years and the only sanity and 'near' happiness I have had was when we had no contact.
Now I'm in a position (which I was in all those years ago) where I'm anxious about her turning up or texting and, at the same time, feeling guilt for upsetting her - the truth hurts mum. I hate being put in this position again and again and again and not sure where to go from here.
Some people go back and forth between No Contact (NC) and Limited Contact (LC). It's okay to take a break. You can't change your mother, but you can change the way you interact with her and react to her. Some strategic communication skills can make things better.
BOUNDARIES can be helpful to you. They are for your well being and are up to you to set and consistently enforce. Social media commonly becomes a problem with a person with BPD (pwBPD). Even if you resume contact with your mom, you might want to keep boundaries in place for social media. (your mom doesn't have access to yours and you stay away from her's).
Pinned at the top of this message board, is a section for "Lessons". Browse through it, click on some lessons and take a look. Perhaps you might want to bookmark a few. There is, also, a "Tools Menu" within the large green band at the top of this page. There are some links to lessons there as well.
It's okay to take a break from texting. You can choose to block them for awhile, so you won't have to deal with them. Has your mom appeared unannounced on your door step in the past?
It can be helpful to read about
FOG and
FOG DISCUSSION THREAD It's good to vent and continue to share your story with others. Take some time to take care of yourself. Have you tried some therapy? Are there some things you do to manage your stress and self-soothe?