Lost!!!

So I already have 2 kids (7 years and 12 months) and due to medical issues (heavy blood loss straight after both babies/retained placenta) we're not looking to have anymore anytime soon... However I am still breastfeeding and also looking for the most natural contraception possible. We dont like condoms... And I'm not keen on the pill either due to its increased links to cancer... Any help is appreciated ladies ❤