Hi @Hopenfaith,
Welcome to the forums! Apologies that a response has not come up sooner. It is so great that you have reached our here. It's not always each to get into a new space like an online community and share your story so thank you for your vulnerability.
This sounds like an upsetting situation - have you been able to speak to your sibling alone to possibly explain how you are feeling and try to reconnect a bit? Or is that not very welcomed at the moment? Is there anymore family that could perhaps help to get reconnected a bit more?
Keep reaching out - more peers will come through soon to offer more support too!