How do I know if I'm perimenopausal if I don't have periods due to mini pill?

[sugarbum]

I feel a bit stupid asking the question, but I have been on the pill for a decade and don't have bleeds.

I looked at a list of symptoms on good old google but some of these describe what I'm like anyway. (Lower sex drive, Urine leakage when coughing or sneezing)
I don't think I have mood swings or PMS, but I think maybe the pill regulates that - nor do I have hot flushes or trouble sleeping.

How would I know? Or will I just know when it all begins? I'm 45.

Hot flushes
Breast tenderness
Worse premenstrual syndrome
Lower sex drive
Fatigue
Irregular periods
Vaginal dryness; discomfort during sex
Urine leakage when coughing or sneezing
Urinary urgency (an urgent need to urinate more frequently)
Mood swings
Trouble sleeping

That's exactly what I'm wondering. I'm 51, no signs of menopause yet, but that's presumably because I'm getting all my hormones from the pill (combined pill not mini pill). If I stopped taking it, could I find myself happily the other side. Or would there be some kind of catastrophic hormone crash and I'd get all symptoms in hyperdrive? I'd be very grateful to hear people's experiences.