Hello dear
Understand your concern.
I think it is due to perimenopausal state.
The symptoms like delayed period, hot flushes , light headendness occur due to hormonal imbalance.
There is a decreased
ovarian reserve.
So estrogen and
progesterone is decreased and FSH , LH is increased.
Other symptoms like
vaginal dryness, mood change and difficulties in sleeping occur.
So pregnancy chance is less.
It is sign of
menopause.
Also note other caauses of late period are:
1. High level of stress
2. Change in life style
3. Late ovulation
4. Excessive exercise
5. Drugs: Birth control pills, tyroid medication, Excessive tea and caffeine
6. Thyroid problem
7. Hormonal imbalance
Also note that
Menstruation required co ordinate action of various hormone that secreted by ovary (estrogen and progesterone) and brain (FSH and LH).
If any above hormone is decreased or increased there is imbalance in menstruation.
So please do full hormonal profile : Estrogen, progestron, LH, FSH, HCG and thyroid hormone.
That help to diagnose hormonal imbalance.
Hope this may help you
All the best.
Stay healthy.