Welcome to OCF! So sorry to read about what your sister has gone thru. It has been very kind of you to help her so much.

Since she has only finished her treatments last month it still could be some time before she is able to completely resume all of her usual duties. Nutrition and hydration play a huge role in how well she is doing. If she cant keep down enough nutrition she isnt getting what she needs to rebuild her body. An oral cancer patient who still continues to lose weight that long after finishing treatment needs to have a good chat with their physician. By now she should be coming out of the tunnel where she is beginning to feel a little better. Depression is often a factor with oral cancer patients. Even caregivers sometimes seek out therapists and take anxiety meds right along with the OC patients.

You have alot on your shoulders! Hope your sister begins to improve very soon.