Hi AbbieT it's no wonder your head is in a spin as there is so much information to try to process and understand also it's a waiting game which is so hard.  It's frightening when a parent is ill whilst I can't advice you on your mum's condition I do understand all your concerns.

My daughters are going through the same as my husband has metastatic lung cancer & hate that they can't get answers to all their questions & fears.  

People on the forum are great always there to offer support including myself if you want.

Take care of yourself Jude

My mum also has metastatic breast cancer hers is in her bones I care for her I found when mum my was diagnosed in 2012 there was  so much infomation and suggestions on how to help but what helped me was remembering all the good times with her and I'm sure you will have many more lovley memories to come all you can do is let your mum know your there for her I get frightened every day now my mum is coming to the end of her journey but your not alone if you need to talk you can always message me and if you ever need someone to talk to x