49.5 years and no monthly cycle in 9 weeks?

I'm 49 1/2 years old and have always been on schedule. I haven't had a period in 9 weeks, but I have all the symptoms. I've also lost over 30 lbs. in the past 8 months. How many of you started menopause at my age? Are there supplements that you take and how can you tell if you lack a specific hormone?