If I may correct you, irregular periods are a consequence of disordered metabolism known as PCOS, sometimes
thyroid issue may a part of this disordered metabolism.
You are a bit overweight for your height, and the unhealthy excess weight may be the reason for the altered metabolism.
This may alter your thyroid,
lipid profile ,
sugar, androgen levels too.
Next Steps
Hence you may need
thyroid profile, Fasting insulin,
sugar, Fasting lipids, Serum
testosterone along with a pelvic scan
Health Tips
And the good news is it is completely reversible with lifestyle changes...diet ,exercise, meditation.
Do connect for further details