Hello and welcome to HCM.
Thank you for your query.
From the description of your cycles (the bleed) and the endometrial thickening, this could be caused by a number of conditions, which I cannot comment on, but shall help by listing some of the most common:
-Dysfunctional uterine bleed
-Pelvic inflammatory disease
and a few other.
A transvaginal ultrasound
(TVS) and a biopsy
would certainly help.
Also, a word of advise, if you are indeed diagnosed with any such conditions and have completed your family, then discuss with your doctor and consider going for a hysterectomy
which would be a permanent solution to all such problems.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.healthcaremagic.com/doctors/dr-shoaib-khan/64581 . I would gladly help you.