Hi there @Bellablor & welcome to the online forum. Just like me I had never been on an online forum before and was not certain how to post etc etc. I have been on the forum for just under 6 months and have received great support, inspiration and terrific advice about several things (medical and non-medical). I have commented quite a few times that this is a great place with like minded, supportive ladies who simply "get you".
Simply by posting, chatting, sharing a random thought or fear is not simply vetting. It is being able to offload to those who understand - yes as wonderful as our family and friends are.
Yes, it does seem as though the outside world is going on around you and sometimes you feel like you are having an out of body experience and are not a participant.
You mention being stuck at home (no work or gym) and I think that perhaps apart from your bc diagnosis you are otherwise "healthy" ? That in itself is frustrating. Maybe you have some favourite movies or TV series on DVD (or able to binge watch something whilst you have some alone time). Look on it as "me time" and perhaps your friends may have something in mind (or can lend you).
Welcome again to you Paula and @"Just Fer" <3
Best wishes Sheryl