Are there laws in place to protect the caregivers of diabetics?

My seven-year old child has Type 1 diabetes. My employer wrote me up for missing work to care for her. My husband and I are the only ones who know how to care for her when she is well, much less when she is ill. She was diagnosed eight months ago, and we are all still learning. The write up does not specifically reference diabetes (although it did state they "are aware of the difficult times you are going through"), however with the exception of one instance, and two days I did work (not sure why they are listed) the absences were related to caring for our diabetic daughter due to her illness or appointments. I was in constant contact with my boss and even made special arrangements with her to come in at different times. A Type 1 diabetic is very susceptible to illness as their immune system is compromised. She has already been sick four times this year, and twice, other family members, including myself, have come down with the illness as well. Prior to this year I have not had an excessive history of missing work in the six years I have been with the company. (Possibly once during each season?? The employment is seasonal, that is, January through April 15th)