I had a retinal detachment surgery and was being treated for osteoporosis, but I didn't complete the treatment because my husband wants me to get pregnant; I have three daughters, and my eyesight deteriorates with each pregnancy. During my first pregnancy, I had a detachment, and pregnancy is very difficult for me. I am afraid for my eyes, and my bones are weak, and my husband does not want me to use contraception. So, if I take contraception without his knowledge, will I be sinful?