Kathleen,
You have some valid concerns. Perhaps you could run these past your oncologist and/or GP or the hospital patient services to see what is offered. Spending the last one or two weeks of treatment at or nearby might be a better option if that is available. Without that, you might only make it to the five week mark on your own. The last two weeks and then the two weeks after treatment is done is likely the most difficult.
The ability to eat or take nourishment should also be considered. That might be an issue after week four as well and should be addressed before it needs to be addressed. Many of us have opted for a feeding tube so we can feast on a bag lunch three times a day.
For now, ask the care team to see what is available. We are here for you when and if you need to be pulled down from the wall you may be climbing as time goes on. Courage.