Hey there,
crazyinlove77. Welcome to bpdfamily.

Contact from an ex so shortly after a break up can feel very confusing. In a lot of our cases here within this community, overwhelming. There’s a whole lot of emotion swimming around in us. If you’re reluctant to respond to her, I would say don’t. At least not now. It sounds like you’re trying to give yourself emotional space. Trust your actions. There is nothing wrong with allowing yourself some breathing room.
Many of us here have the same concerns that you do. What really helps is discussion. If you’re comfortable, will you give us some details about your relationship? How long were the two of you together? What caused the breakup and how are you feeling about it?
To answer your question, sparse communication is best between my ex and me. We share a young child so communication is necessary. I wish that I could just cut her out. I know that she feels the same about me. Do you feel that communication with her will benefit you? Glad to have you with us.