@Spirit-Harmony - for me the only concerns my Oncologist has mentioned with Letrozole is Osteoporosis, Cholesterol and weight gain - no mention of menopause symptoms appearing. For me personally I didn't have any Menopause symptoms at all, I was starting to think my body must be lazy and giving it a wide berth and then BC turned in and made up for it!!
As to the symptoms he has mentioned, each is under surveillance by me, GP and the Oncologist and so far so good
Take care and as I said earlier I do hope the menopause symptoms will pass sooner rather than later and your body adjusts to Letrozole