Hi @Tilly45 and welcome. A bc diagnosis is certainly a shock, and a stage 4 diagnosis must make it that much harder to get your head around. I'm not stage 4, but there are others on here who are that will likely jump on and say hi, too. They have loads of advice for living well with mets. There are also social groups specifically for young women and for living with metastatic cancer if you should like to join. It's great that you've been able to get onto a trial for ribociclib. It's reputably a very effective drug. I've just started on a trial for palbociclib as a preventative. I'm only 4 days in, but so far I feel quite well, not too tired. This is a great place to ask questions, so ask away. Good luck with your drug trial xxxooo