Sorry, don't know much about chemo.
For the oedema, keep the legs/feet raised.
When sitting, have them resting on something same height as seat (or near same height if that's too uncomfortable). If you have a bed that can raise your legs, do that. It may make you need to pee more at night - that's good (it's the excess fluid draining out).
Can you talk with your chemo team? I'm wondering if they might suggest a diuretic, although that affects blood pressure too, so needs linking with any blood pressure meds dose.