Hello girls, who has put in a intrauterine spiral (silver)? Is it wort…

Hello girls, who has put in a intrauterine spiral (silver)? Is it worth putting it in or not? The husband doesn't want me to put it in, he says that because of the spiral many complications and inflammations, heavy consequences, so his sister told him, and I am very afraid to get pregnant after CS, the spiral is already bought (Yuna). How can I convince my husband to agree with me or maybe just don't say anything and put it in silently? Is it really true that because of the coil there can be many bad consequences? Thanks in advance for the answer.