Irregular periods for 4 months along with a
TSH of 4.29 point toward a mildly underactive
thyroid, which is one of the most common and treatable causes of cycle irregularity. The reading itself isn't very high, but combined with your missed periods it's worth addressing properly.
Next Steps
Please see a gynaecologist or endocrinologist to repeat the
thyroid test along with TPO antibodies and get a tailored treatment plan. Periods usually become regular again within a few months of correcting thyroid levels.
Health Tips
Get checked sooner if you notice heavy bleeding, unusual weight change, or your periods stop completely.