Wa'alaikumassalam sis! Ish, IUD pun fail, that's frustrating la. Honestly, since you're highly fertile, mungkin kena try combination methods, like condom + spermicide or condom + withdrawal, sebab satu method je tak cukup untuk your body type. A few of my mum friends dalam situation sama end up consulting dengan gynae untuk explore laparoscopic tubal ligation or implant yang lebih secure, sebab birth control memang tricky kalau you're one of those super fertile moms. Best thing is to have a proper discussion with your doctor about permanent or highly effective options, so you can plan your family properly tanpa stress lepas tu.