Are these symptoms of menopause?

I am 46 years old and over the past three years my cycles have not been every 28 days. They are now every 24 to 32 days apart. I now am at day 35 with no period in sight. I seem to get cramps, but there is no sign of starting. I have also been very moody, taking things a bit to personal, especially at home. There are no symptoms of pregnancy. Any suggestions.