If he wants a certain kind of cracker you normally don't buy, go buy it. Generally speaking, the better you meet your husband's needs, the quicker he'll get well. Third, balance your honest communication of frustrations with genuine support and encouragement. One of the best ways to do this, by the way, is through touch. Hold your partner's hand when you can.
Touch is powerful medicine.
Fourth, pray for a healthy recovery. Ask God to give you wisdom in helping you deal with your partner's illness. Ask God to adjust your attitude, if necessary. Once you have prayed on your own, pray with your spouse. God will help you care for each other as you honor your marriage vows in sickness and in health.