In short, you are.
Not many people consider themselves to be a full or part-time "caregiver" to another person. Most people consider themselves as "helpers." When you ask the average person, she/he will say, I help my Mom when she needs it or I help Dad get to the doctor. The kinds help can include health, emotional, legal, portfolio (financial or insurance), or social issues (aka. HELPS). So we call those that provide this type of care: careHELPerS.