avoid pregnancy

I had 2 emergency c-sections, 1 ovary removed because of a big 22cm syst..

now I have only pne ovary.is there anyone that can help me to control my ovulation so I can avoide pregnancy naturally?the Dr told me no hormone for me because of the cyst ,I'm to high risk no birth control pills,short not even the paraguard because I have only 1 ovary left im 28years my husband and I don't want to take any chance to try for a 3rd one...please help!