christina, You could be menopausal, (very early) but I would think you are probably peri menopausal. The symptoms are pretty much the same, with the exception of erratic periods. Since your periods are still regular and haven't changed you are no doubt peri menopausal, which means the prelude to menopause. Unless your mother and grandmother went through an early menopause, I highly doubt that is your problem. It is usually genetic, if they did you could, if they didn't I doubt you are.
Peri menopause generally starts about 40 to 48. Many women have thought they were menopausal, when infact they weren't. True menopause usually occurs around the age of 50. Have your doctor check your hormone levels as that is the only true measure of menopause.