Really sorry to hear this. Sounds like a lot of miscommunication.
Are you able to set up a daily meeting with Linda's Doctor/team. Where they can update you with progress, test results and the current plan and options. This also gives you and Michael a place to ask questions and ensure you understand the plan. The nurses involved in Linda's care should attend this daily meeting too.
Complicated health always involves 2 steps forward and 1 step backwards. However Family should never feel like you two are.
Thinking of the 3 of you,
Tammy

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!