Hi NC,

I'd like to welcome you to bpdfamily. I'm sorry that you're going through a difficult time with your sister. I can see how a pwBPD during a life event would feel like they are consuming your life, a pwBPD can be extremely difficult under normal circumstances but a pwBPD that is going through a very stressful event is going to be really hard. It's equally hard for you because you are in the line of sight for her emotional barrage.
I'm glad that you have found us. There is hope. I would suggest to read as much as you can about BPD you will quickly see the benefits and become proficient over time. Members here can relate to your situation and what you are going through.
A pwBPD cannot handle stress well and will dysregulate. BPD is an emotional dysregulation disorder, they cannot regulate their emotions very well and take much longer to return to their emotional baseline of happiness. Stress with exacerbate BPD traits.
Is your sister diagnosed? When you say that she has consumed your thoughts, do you mean that she makes you feel worried or guilty about things? Does she make you feel responsible for all of her problems and the problems she has with family?