I Am Always On Time With My Period, Three Weeks

I am always on time with my period, three weeks three days. I am now a full week late, I am 42 and had my tubes tied 21 years ago. My question is, am I too young for menopause? I have also gained six pounds (I work hard to maintain my weight because I used to be overweight) and am craving sweets and I used to favor salty stuff, I used to hate donuts now I eat one everyday. Could that be hormonal?