Hi, so sorry to hear this. My MIL has had COPD for about 10 years and reached 'end stage' 4 years ago, however before xmas she was diagnosed with lung cancer.
She too, for about a year, has been on o2 and nebulisers at home and over christmas she contracted flu and we thought she was going then, but she rallied around.
However over the past 4 weeks things have been pretty bad. She started getting quite confused, then stopped eating/drinking, became very anxious etc...
My DP has, along with his siblings, been caring for her for the past few weeks. It took a week or so to get district nursing care/hospice support sorted out. And they've been fantastic. They've sorted out a commode, a hospital bed and other bits of kit.
Over the past week or so MIL has lost the ability to swallow and has been very agitated. On Monday she went on a syringe driver of morphine and a sedative and we are now waiting for the end.
It's been a rollercoaster few years, intensive care admissions, hospital acquired infections etc and we've been told to expect the worst a few times. This past few weeks though have just been different.
There is support out there, if palliative care is what she needs now then ask the GP for a hospice referral, our local hospice team has a social worker who can lead on arranging a care package etc... Given your family circumstances it may well be very difficult to care for your mother at home. I've seen how incredibly hard it's been for my DP over the past few weeks and he has 3 other siblings and none of us have new babies/toddlers etc. Also he's a teacher so for the past 2 weeks hasn't had to worry about work etc. The hospice team, and the district nurses, have been invaluable in initiating 'difficult' conversations with MIL and FIL over the past couple of weeks.
I have an idea of exactly what you are going through at the moment, if you want any advice/support please PM me and I'll be more than happy to try and help.