A very warm welcome to you at a time where you're trying so hard to make sense of what you're feeling.
I'm wondering if you changed the words 'sad/worried/panicked' to something different, whether those different words could perhaps offer you more insight. For example, does 'grief/concerned/stressed or anxious' offer any further insight? If so, what do you feel you could be grieving? What concerns do you get a sense of? What stresses do you feel may result from the pregnancy or introduction of a baby into everyone's life, including yours?
I find sometimes I can get a general or basic sense of what I'm feeling at times. General or basic doesn't always hit the mark, compared with an accurate sense. Sometimes it can take a little while to find exactly the right word that describes exactly what I'm feeling. Wondering whether what you could be feeling is a sense of disconnection from your sister. I'm going back a few decades when I recall that feeling myself, with my own sister. We were kind of two peas in a pod, so to speak. It felt like one of those peas had left the pod to start a new life. Btw, we have a brilliant relationship as 2 gals in their 50s these days.😊
