I'm 58 and wanted to tell you that menopause can take a decade to go through. Everyone experiences menopause differently. If you are looking at an elevated FSH level, know that you can still conceive, assuming you decide you want to, and a fertility specialist can evaluate your eggs which is a much better indicator of your ability to conceive at this point. I have a girlfriend who conceived for the first time at age 50 with an elevated FSH.
My experience with menopause was 8 years of worsened PMS, breakthrough bleeding, and hot flashes, however the hot flashes I had in my forties were truly nothing, nothing at all, compared to the final year of menopause when they became so bad, so frequent, chills after, sweater on and off 300 times a day, vasa vagal syndrome during my periods- I felt like I had the flu for a year. I slept maybe 5 hrs a might. I would paint rooms in the middle of the night. (I did get a lot done!)Then my periods ceased completely. I nevered missed any periods. They just stopped like somebody shut off a faucet when I was 51. My mother's experience (and that's supposed to be a big indicator for us) was entirely different. She missed periods for one or two or three months for five years. She did, however, actually stop at age 51, just like me. So everybody's experience is different and this does not necessarily mean the end of child bearing for you. Good luck!