Do you have any friends or other family members you could reach out to occasionally? What about community resources, being a caregiver can be taxing on a relationship, can you look for outside help? Are there things you need that your husband can't provide, can you afford to have someone come in to help you?
I understand how frustrated you must be since you mentioned in another post how independent you've always been, I'm sure this is very hard on your self esteem, it hurts to have to rely on others. I wonder if the two of you might sit down and discuss how this is affecting you both, if you can try to understand each others point of view?