Menopause is a possibility at 46. Happened to me at age 49, but I had a hysterectomy (ovaries intact) at age 35 and slowly my ovaries went into failure.
See the Gyno on the 15th and have a female hormone panel drawn. Doesn't sound like Menopause yet, but you are getting there. Rule of thumb=one full year of no periods.
That's the thing-- I guess there is a textbook definition of menopause but it seems so individual. I'm more the opposite of the heavy bleeding for shorter duration but do have a good friend who by 50 totally ceased having any periods. Before that, she'd have one totally out of the blue after 7 or 8 months. Then it went for a full year and she was done. So, your pattern is one as well. What did your doctor say at your appointment? (wasn't it yesterday?)
Women follow different patterns with menopause. You are young to be in this stage but it does happy earlier for some women. The two most common patterns I hear is actually an INCREASE in bleeding, heavier periods but for shorter duration. This is me. Wow, some cycles I'm like holy cow! Clots and lots of bleeding. More so than ever when I was younger. I have friends who have a slowing down of their cycle with lighter periods, shorter duration.
However, in all honesty, if I were you, if you are skipping cycles but still having them, I'd ask for blood work and get your thyroid checked. I had this issue years ago with periods every 3 to 4 months because my thyroid is slow. At your age, this is much more likely than full on menopause.
Let us know how the doctor's appointment goes. good luck