Hi Hannalou, I'd say it's perfectly normal for cycles to shorten, or to lengthen, mine did both, a year of each one aged 49 and 50 then they stopped once I turned 51.
So mine was quite a well behaved menopause, certainly "normal" and yours sounds similar to me, just your family do it slightly older.
Since your cycle was short already, then it seems to fit the normal picture for it to get even shorter.
My cycle was 29-31 days in fertile years, then was 21-25 days at the end. Sometime in my 40s I began to get brown mucus two days before my bleed, almost like the mucus plug of pregnancy, but no red in it.
Some of the time I skipped the actual bleeding part of the cycle but could still feel the cycle if you know what I mean.
Two years is a long time, have you thought of taking sequi HRT? That might regulate your bleeding to once a month.
Edit, sorry, my brain hasn't woken up yet, not two years but two months. I read it properly this time.
Progesterone intolerance is something I get with bells on too, it meant I couldn't tolerate any allowed HRT except Tibolone but my GP barely recognises the word menopause, yours might be more useful and let you try the more natural ones like cyclogest or utrogestan, but many women, myself included, cannot tolerate them either.
Tibolone isn't given to peri women for some reason unless they are over 54. I take that and still bleed every month but it doesn't trigger progesterone intolerance and it is the absolute best for anxiety. It's not so popular because it takes about three months to work and younger women are often settled on an HRT before being allowed tibolone so never think of switching.
With tibolone something like 90% of women have no bleeding after the first month.