Premature/very early menopause??? Any help?

I am very confused and feeling lost. Iam 39( will turn 40 in Jan2024) and I think I am on my way to premature or very early menopause.
I have some menopausal symptoms, though I still get periods every month. Looking back, I found that I had symptoms of perimenopause since late twnties/ early thirties and continued to have symptoms till now. My cycles have been regular most of my adult life, but changed from 28 day cycles to 23-24 day cycles at around 30 years ( I recently learned that this is a sign of perimenopause) .Now I have cycles of 25-26 days average, but often period comes 1-2 days earlier or 2-3 days later than expected, so cycles are between 23 to 29 days. Some doctors say that this is normal, not a cause for concern, others say that this is abnormal and it should be strictly on time. I don't know which is correct.
My other symptoms are hot flushes, night sweats and unexplained digestive issues.
My first experience of night sweats was in 2018. I was 34, so menopause was not in mind. I was tested for other causes of night sweats ( infections, blood diseases, cancer) and all was clear.Eventually the night sweats disappeared on their own and I concluded that they were due to stress (I had a major life stressor at that time and the night sweats disappeared shortly after that stressor was over). I was free from night sweats and hot flushes for 4 years. In October 2022, I started to have the worst night sweats ever. Before they started, I had strept throat and while recovering from it, night sweats started. I was sleep deprived for weeks and suffered a lot in my daily life from exhaustion, stress and lack of sleep.I could barely work or drive. I had also occasional hot flushes during the day, though not very severe. I went to a gynecologist, had my hormones tested and they came back normal, ultrasound was done and the ovaries and uterus looked normal. This time again, the hot flushes disappeared after a couple of months. At almost the same time, I stated to have digestive symptoms (severe abdominal pain, gas, burping, diarrhea , weight loss) .Whenever I googled rhese symptoms, the result was always Cancer (colon, stomach, pancreas) so I pursued testing for all these cancers and for other possible causes like infections, IBD and celiac..Everything came back clear. I was told it was just IBS but I don't really think it is. The symptoms eventually got a bit better but did not disappear.I still have some intermittent gas and mild pain. I recently knew that these symptoms are very common menopausal symptoms.
Fast forward to August 2023, I caught an upper respiratory tract infection (probably the Covid new variant) and upon recovery from it, I started to get night sweats again.A couple of days later,hot flushes attacked me in a horrible way. I have ver frequent and severe hot flushes, to the extent that I have to stay all the time sitting motionless in front of the AC and/or fan ,so as not to get a hot flush.Any slight movement or moving away from the cold air, I get a hot flush and profuse sweating. A cold shower can trigger the worst hot flushes ever.Sometimes, especially after showering, I have hot flushes non-stop for more than an hour or 2, even with both the AC and fan switched on. When I walk outdoors and then enter into an air-conditioned place, I get a hot flush and sweating. I went to another gynecologist again, had a new ultrasoud and hormone tests. All was normal apart from reduced ovarian reserve.The gynecologist told me that the reduced reserve is not too low and is acceptable in my age, and doesn't mean menopause, so no mention of hormone replacement.Another gynecologist said the same, but I tend not to believe them as I read a lot that hormone tests are not accurate in perimenopause and that having hot flushes is a sign that the periods are going to stop very soon and probably suddenly. This gives me a lot of stress, it is no fun to have menopause at or before 40 (regarding the health and emotional consequences) .Sometimes I think that this may not be the case but at other times, when I consider my history, I believe that I am really in late perimenopause now and that I have started the transition very early and will end soon.
By the way, I had early puberty (at 10 and half years and have never been pregnant, and I am overweight/slightly obese now. I guess my mom had her menopause at 42 to 45 (not sure, just guessing) though everytime I tell her I am having menopausal symptoms she says that I am too young or that I still
have 10 years to expect menopause.
Does anyone have an experience similar to mine? and what was the timeline ? what can I do to have some answers and peace of mind ??