I went into immediate surgical
menopause at age 37 and was not able to take
HRT due to cancer. It has been very hard for me. Everyone is different and some people have a harder time than others. If you take HRT, you probably won't notice many changes except lack of a period.
If you aren't taking HRT, you could have any or all of the symptoms associated with menopause including hot flashes, vaginal dryness, insomnia, mood changes, a decreased libido and many others.