Eleven years of irregular, heavy periods with clots that don't ease on their own, especially after your haemoglobin dropped to 6, point to more than weight alone. Fibroids, adenomyosis or a thickened uterine lining alongside PCOS-type hormonal imbalance are common causes. Tranexamic acid controls bleeding once it starts, but it won't regulate your cycle. Weight loss helps the hormonal side, but a structural cause needs its own treatment.
Next Steps
Ask your gynaecologist for a pelvic ultrasound and a hormone panel, and get your
thyroid rechecked even on eltroxin. If a cause is found, a hormonal IUD or hysteroscopy may help, since neither depends on your weight.
Health Tips
Keep checking your haemoglobin regularly, and see your gynaecologist sooner if clots get larger, bleeding soaks through in under an hour, or you feel breathless or faint.